1978 GMC C25 Auto Trans Vacuum Modulator
Navigate our online catalogue to find original replacement Auto Trans Vacuum Modulators specifically designed to fit a 1978 GMC C25.




Auto Trans Vacuum Modulator
$108.02 CAD
In Stock
Condition: New
Ships: Today, Nov. 5th
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5); Transmission Code: THM350;
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5); Transmission Code: THM350;
Vehicle Fitment Notes:
w/ Green Stripe
w/ Green Stripe




Auto Trans Vacuum Modulator
$108.02 CAD
In Stock
Condition: New
Ships: Today, Nov. 5th
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5); Transmission Code: THM350;
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5); Transmission Code: THM350;
Vehicle Fitment Notes:
with green stripe
with green stripe




Auto Trans Vacuum Modulator
$108.02 CAD
In Stock
Condition: New
Ships: Today, Nov. 5th
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Vehicle Fitment Notes:
w/ Green Stripe
w/ Green Stripe




Auto Trans Vacuum Modulator
$108.02 CAD
In Stock
Condition: New
Ships: Today, Nov. 5th
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Vehicle Fitment Notes:
with green stripe
with green stripe




Auto Trans Vacuum Modulator
$108.02 CAD
In Stock
Condition: New
Ships: Today, Nov. 5th
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Pick-Up: Ready in 1 Hour (Order before 4:00 PM)
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6); Transmission Code: THM400; Transmission Speeds: 3;
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6); Transmission Code: THM400; Transmission Speeds: 3;





Auto Trans Vacuum Modulator
$109.24 CAD
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5); Transmission Code: THM350;
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5); Transmission Code: THM350;
Vehicle Fitment Notes:
w/ Green Stripe
w/ Green Stripe





Auto Trans Vacuum Modulator
$109.24 CAD
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Vehicle Fitment Notes:
w/ Green Stripe
w/ Green Stripe





Auto Trans Vacuum Modulator
$109.24 CAD
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6); Transmission Code: THM400; Transmission Speeds: 3;
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6); Transmission Code: THM400; Transmission Speeds: 3;




Auto Trans Vacuum Modulator
$174.67 CAD
Out of Stock
Condition: New
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Vehicle Fitment Notes:
Green
Green




Auto Trans Vacuum Modulator
$57.72 CAD
Out of Stock
Condition: New
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Vehicle Fitment Notes:
w/ Blue Stripe
w/ Blue Stripe




Auto Trans Vacuum Modulator
$58.68 CAD
Call For Availability
Condition: New
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Vehicle Fitment Notes:
w/ Blue Stripe
w/ Blue Stripe




Auto Trans Vacuum Modulator
$58.68 CAD
Call For Availability
Condition: New
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5); Transmission Code: THM350;
Vehicle Fitment Notes:
with blue stripe
with blue stripe




Auto Trans Vacuum Modulator
$157.02 CAD
Call For Availability
Condition: New
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Vehicle Fitment Notes:
Green
Green

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 4.1L 250ci L6 (3.68x3.91; 93.5x99.3);
Engine Base: 4.1L 250ci L6 (3.68x3.91; 93.5x99.3);
Vehicle Fitment Notes:
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 4.8L 292ci L6 (3.88x4.13; 98.4x104.8);
Engine Base: 4.8L 292ci L6 (3.88x4.13; 98.4x104.8);
Vehicle Fitment Notes:
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Vehicle Fitment Notes:
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5);
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5);
Vehicle Fitment Notes:
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5);
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5);
Vehicle Fitment Notes:
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6);
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6);
Vehicle Fitment Notes:
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted
Black screw Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 4.1L 250ci L6 (3.68x3.91; 93.5x99.3);
Engine Base: 4.1L 250ci L6 (3.68x3.91; 93.5x99.3);
Vehicle Fitment Notes:
No color code Auto Trans Vacuum Modulator Use until inventory is depleted
No color code Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 4.8L 292ci L6 (3.88x4.13; 98.4x104.8);
Engine Base: 4.8L 292ci L6 (3.88x4.13; 98.4x104.8);
Vehicle Fitment Notes:
No color code Auto Trans Vacuum Modulator Use until inventory is depleted
No color code Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Engine Base: 5.0L 305ci V8 (3.74x3.48; 94.9x88.4);
Vehicle Fitment Notes:
No color code Auto Trans Vacuum Modulator Use until inventory is depleted
No color code Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5);
Engine Base: 5.7L 350ci V8 (4.00x3.48; 101.6x88.5);
Vehicle Fitment Notes:
No color code Auto Trans Vacuum Modulator Use until inventory is depleted
No color code Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5);
Engine Base: 6.6L 400ci V8 (4.13x3.76; 104.8x95.5);
Vehicle Fitment Notes:
No color code Auto Trans Vacuum Modulator Use until inventory is depleted
No color code Auto Trans Vacuum Modulator Use until inventory is depleted

Auto Trans Vacuum Modulator
Call for Pricing
Out of Stock
Condition: New
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6);
Engine Base: 7.4L 454ci V8 (4.25x4.00; 108.0x101.6);
Vehicle Fitment Notes:
No color code Auto Trans Vacuum Modulator Use until inventory is depleted
No color code Auto Trans Vacuum Modulator Use until inventory is depleted