Instant Rebates
800.345.4545
Call Our Support Line
24 Hours / 7 Days a Week!  
FREE SHIPPING!
Orders Over $100
Same Day Shipping Before 11 PM ET
0
My Cart
$0.00
Free Shipping on Orders Over $100
Shop By Vehicle
Shop By
Category
Close Menu
Top Categories
All Categories

Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates
Rebates
Help

Hypertech 121082

Thermo Master Power Chip 1991 C2500/C3500, K2500/K3500 454

Hypertech 121082

533-121082

made in usa
jegs shipping
FREE Shipping
Estimated ship date 05/30/17 if Ordered Today
Easy Returns
Lowest Price Guarantee
Hypertech 121082 Thermo Master Power Chip 1991 C2500/C3500, K2500/K3500 454 $121.99
Hypertech Thermo Master Power Chip
  • 1991 C2500/C3500, K2500/K3500 454
  • Manual Transmission
  • 4.10 and 4.56 Rear Axle Gear Ratio

  • Specifications:

    Quantity
    Sold individually
    Manufacturer's Part Number:
    121082

    Plug-In Performance for 1980's and 1990's GM Vehicles

    The premiere name in classic automotive ECM programming, Hypertech became famous with this replaceable power chip, or "PROM", for older vehicles. Before the OBD-II port, OE computer chips on the ECM had to be physically replaced. Hypertech's Thermo Master Chip is one of the best PROMs available. It can create instant power by adjusting spark advance and air/fuel ratio. Such adjustments can also increase fuel mileage potential with sensible driving. Designed for use with a PowerStat 160° or 180° Thermostat, Thermo Master Chips eliminate tuning guesswork... just plug in and drive.

    Does Hypertech 121082 fit your vehicle?

    Narrow Results

    1991 GMC K2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC C2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991-1992 CHEVROLET C2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SCOTTSDALE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC C2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLX
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC K3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991-1992 CHEVROLET K2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SCOTTSDALE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC C3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLX
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET K3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SCOTTSDALE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC C2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC C3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET C2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET K3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SILVERADO
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET K3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC C3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET C3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SCOTTSDALE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET K2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SILVERADO
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC K3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET K2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET C2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SILVERADO
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC K2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC K3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLX
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET C3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SILVERADO
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 GMC K2500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: SIERRA SLX
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1991 CHEVROLET C3500 PICKUP

    • Fitment_Note: For Use w/Premium Octane Fuel~Cooling Fans 160 Degrees - If Equipped w/Electric Cooling Fans
    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )
    Items You Need