1966 GMC 3500 Spark Plug
Browse our online catalogue to find original replacement Spark Plugs specifically designed to fit a 1966 GMC 3500.
1966 GMC 3500 Spark Plug
$3.83
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Boxed Product Resistor Plug Plug Type Number RN12YC
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Boxed Product Resistor Plug Plug Type Number RN12YC
1966 GMC 3500 Spark Plug
$3.83
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Boxed Product Resistor Plug Plug Type Number RN12YC
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Boxed Product Resistor Plug Plug Type Number RN12YC
1966 GMC 3500 Spark Plug
$3.80
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 8
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Vehicle Fitment Notes:
Non-Resistor Type Gap 0.035 (in) Boxed Product Plug Type Number J8C
Non-Resistor Type Gap 0.035 (in) Boxed Product Plug Type Number J8C
1966 GMC 3500 Spark Plug
$3.83
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Vehicle Fitment Notes:
OE Type Gap 0.035 (in) Plug Type Number RN14YC
OE Type Gap 0.035 (in) Plug Type Number RN14YC
1966 GMC 3500 Spark Plug
$3.99
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/8 (in) Reach Spark Plugs Resistor Type Gap 0.035 (in) Plug Type Number RJ12YC
3/8 (in) Reach Spark Plugs Resistor Type Gap 0.035 (in) Plug Type Number RJ12YC
1966 GMC 3500 Spark Plug
$4.67
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.035 (in) Plug Type Number N12YC
3/4 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.035 (in) Plug Type Number N12YC
1966 GMC 3500 Spark Plug
$4.67
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.040 (in) Plug Type Number N12YC
3/4 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.040 (in) Plug Type Number N12YC
1966 GMC 3500 Spark Plug
$4.10
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Vehicle Fitment Notes:
3/8 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.030 (in) Boxed Product Plug Type Number J6C
3/8 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.030 (in) Boxed Product Plug Type Number J6C
1966 GMC 3500 Spark Plug
$4.20
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 8
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Vehicle Fitment Notes:
Resistor Type Gap 0.035 (in) Plug Type Number RJ8C
Resistor Type Gap 0.035 (in) Plug Type Number RJ8C
1966 GMC 3500 Spark Plug
$6.35
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Vehicle Fitment Notes:
Gap 0.035 (in) Plug Type Number RN14PMC
Gap 0.035 (in) Plug Type Number RN14PMC
1966 GMC 3500 Spark Plug
$6.35
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Plug Type Number RN14PMC
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Plug Type Number RN14PMC
1966 GMC 3500 Spark Plug
$6.35
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Plug Type Number RN14PMC
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Plug Type Number RN14PMC
1966 GMC 3500 Spark Plug
$4.00
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/8 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.035 (in) Plug Type Number J12YC
3/8 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.035 (in) Plug Type Number J12YC
1966 GMC 3500 Spark Plug
$4.30
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Vehicle Fitment Notes:
Gap 0.035 (in) Resistor Plug Plug Type Number RN5C
Gap 0.035 (in) Resistor Plug Plug Type Number RN5C
1966 GMC 3500 Spark Plug
$4.30
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.030 (in) Resistor Plug Plug Type Number RN5C
3/4 (in) Reach Spark Plugs Gap 0.030 (in) Resistor Plug Plug Type Number RN5C
1966 GMC 3500 Spark Plug
$4.30
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351C;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351C;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.030 (in) Resistor Plug Plug Type Number RN5C
3/4 (in) Reach Spark Plugs Gap 0.030 (in) Resistor Plug Plug Type Number RN5C
1966 GMC 3500 Spark Plug
$4.30
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351M;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351M;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.030 (in) Resistor Plug Plug Type Number RN5C
3/4 (in) Reach Spark Plugs Gap 0.030 (in) Resistor Plug Plug Type Number RN5C
1966 GMC 3500 Spark Plug
$4.56
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Vehicle Fitment Notes:
Gap 0.035 (in) Non-Resistor Plug Plug Type Number N5C
Gap 0.035 (in) Non-Resistor Plug Plug Type Number N5C
1966 GMC 3500 Spark Plug
$4.56
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs OE Type Gap 0.030 (in) Non-Resistor Plug Plug Type Number N5C
3/4 (in) Reach Spark Plugs OE Type Gap 0.030 (in) Non-Resistor Plug Plug Type Number N5C
1966 GMC 3500 Spark Plug
$4.56
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351C;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351C;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs OE Type Gap 0.030 (in) Non-Resistor Plug Plug Type Number N5C
3/4 (in) Reach Spark Plugs OE Type Gap 0.030 (in) Non-Resistor Plug Plug Type Number N5C
1966 GMC 3500 Spark Plug
$4.56
10+ In Stock
Condition: New
Ships: Monday Sep. 28th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Pick-Up: Ready in 1 Hour Saturday Sep. 26th
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351M;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351M;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs OE Type Gap 0.030 (in) Non-Resistor Plug Plug Type Number N5C
3/4 (in) Reach Spark Plugs OE Type Gap 0.030 (in) Non-Resistor Plug Plug Type Number N5C
1966 GMC 3500 Spark Plug
$4.07
10+ In Stock
Condition: New
Ships: Next Business Day
Pick-Up: Next Business Day
Pick-Up: Next Business Day
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Vehicle Fitment Notes:
3/8 (in) Reach Spark Plugs Resistor Type Gap 0.030 (in) Plug Type Number RJ6C
3/8 (in) Reach Spark Plugs Resistor Type Gap 0.030 (in) Plug Type Number RJ6C
1966 GMC 3500 Spark Plug
$3.19
Out of Stock
Condition: New
Required Per Vehicle: 8
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Vehicle Fitment Notes:
Non-Resistor Plug OE Style .035 Gap
Non-Resistor Plug OE Style .035 Gap
1966 GMC 3500 Spark Plug
$2.93
Out of Stock
Condition: New
Required Per Vehicle: 8
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Vehicle Fitment Notes:
Non-Resistor Plug OE Style .035 Gap
Non-Resistor Plug OE Style .035 Gap
1966 GMC 3500 Spark Plug
$3.46
Out of Stock
Condition: New
Required Per Vehicle: 8
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Vehicle Fitment Notes:
Resistor Plug .035 Gap
Resistor Plug .035 Gap
1966 GMC 3500 Spark Plug
$3.72
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Vehicle Fitment Notes:
OE Style .035 Gap
OE Style .035 Gap
1966 GMC 3500 Spark Plug
$3.72
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Vehicle Fitment Notes:
OE Style .030 Gap
OE Style .030 Gap
1966 GMC 3500 Spark Plug
$4.35
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Vehicle Fitment Notes:
OE Style .035 Gap
OE Style .035 Gap
1966 GMC 3500 Spark Plug
$4.35
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
OE Style 3/4" Reach .035 Gap
OE Style 3/4" Reach .035 Gap
1966 GMC 3500 Spark Plug
$3.10
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Vehicle Fitment Notes:
Available Only While Supplies Last .035 Gap
Available Only While Supplies Last .035 Gap
1966 GMC 3500 Spark Plug
$3.10
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4 Reach Available Only While Supplies Last .035 Gap
3/4 Reach Available Only While Supplies Last .035 Gap
1966 GMC 3500 Spark Plug
$4.35
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
OE Style 3/8" Reach .035 Gap
OE Style 3/8" Reach .035 Gap
1966 GMC 3500 Spark Plug
$5.00
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Engine Base: 4.8L 4801cc 292ci L6 (3.88x4.13; 98.4x104.8);
Vehicle Fitment Notes:
Obsolete .035 Gap
Obsolete .035 Gap
1966 GMC 3500 Spark Plug
$5.00
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Vehicle Fitment Notes:
Obsolete .030 Gap
Obsolete .030 Gap
1966 GMC 3500 Spark Plug
$5.63
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Vehicle Fitment Notes:
.035 Gap
.035 Gap
1966 GMC 3500 Spark Plug
$5.63
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4" Reach .035 Gap
3/4" Reach .035 Gap
1966 GMC 3500 Spark Plug
$5.63
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/8" Reach .035 Gap
3/8" Reach .035 Gap
1966 GMC 3500 Spark Plug
$8.47
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Vehicle Fitment Notes:
.035 Gap
.035 Gap
1966 GMC 3500 Spark Plug
$8.47
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4" Reach .035 Gap
3/4" Reach .035 Gap
1966 GMC 3500 Spark Plug
$3.74
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Card of 1 Resistor Plug Plug Type Number RN12YC
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Card of 1 Resistor Plug Plug Type Number RN12YC
1966 GMC 3500 Spark Plug
$3.74
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Card of 1 Resistor Plug Plug Type Number RN12YC
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Card of 1 Resistor Plug Plug Type Number RN12YC
1966 GMC 3500 Spark Plug
$10.08
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Engine Base: 4.1L 4097cc 250ci L6 (3.88x3.53; 98.4x89.7);
Vehicle Fitment Notes:
Gap 0.035 (in) Plug Type Number RN14PYP
Gap 0.035 (in) Plug Type Number RN14PYP
1966 GMC 3500 Spark Plug
$10.08
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Plug Type Number RN14PYP
3/4 (in) Reach Spark Plugs Gap 0.035 (in) Plug Type Number RN14PYP
1966 GMC 3500 Spark Plug
$10.08
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9); Engine Designation: 351E;
Vehicle Fitment Notes:
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Plug Type Number RN14PYP
3/4 (in) Reach Spark Plugs Gap 0.040 (in) Plug Type Number RN14PYP
1966 GMC 3500 Spark Plug
$3.74
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Engine Base: 5.7L 5753cc 351ci V6 (4.56x3.58; 115.9x90.9);
Vehicle Fitment Notes:
3/8 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.030 (in) Card of 1 Plug Type Number J6C
3/8 (in) Reach Spark Plugs Non-Resistor Type OE Type Gap 0.030 (in) Card of 1 Plug Type Number J6C
1966 GMC 3500 Spark Plug
$3.91
Out of Stock
Condition: New
Required Per Vehicle: 8
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Engine Base: 4.6L 4638cc 283ci V8 (3.88x3.00; 98.4x76.2);
Vehicle Fitment Notes:
Non-Resistor Type Gap 0.035 (in) Card of 1 Plug Type Number J8C
Non-Resistor Type Gap 0.035 (in) Card of 1 Plug Type Number J8C
1966 GMC 3500 Spark Plug
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 6
Fits: 1966 GMC 3500
Equipped With:
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Engine Base: 5.0L 5012cc 305ci V6 (4.25x3.58; 107.9x90.9);
Vehicle Fitment Notes:
Obsolete 3/8" Reach Replaces 75 .035 Gap
Obsolete 3/8" Reach Replaces 75 .035 Gap