1977 GMC C25 Proform Parts
Choose your Submodel for your 1977 GMC C25
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- Alternator-100 AMP; GM Style 1-Wire Style; Natural Finish; 100% New
- 100 AMP; Style 1-Wire Style; Natural Finish; 100% New
- Alternator; 100 AMP Model; GM 10si 1 Wire Style with Internal Regulator; External Fan Style; Machined Pulley; Natural Finish; 100% New; Products; Sold Individually
- Product Attributes:
- Category: Alternators
- Pulley Diameter: 2 1/2 Inch
- Feature/Benefit: A Manufacturing Break-through Has Enabled Proform To Offer 100% New Alternators With The Same Affordability As Others' Re-built Models!
- Wire Type: 1-wire
- Case Style: 10si Style
- Amperage Output: 100 Amp
- Can you tell the difference? Most alternators look nearly the same, and that's why what's on the inside is so critical. Reliability starts with how it's made. Choosing PROFORM means choosing alternators with components produced by highly specialized machines, assembled by highly trained personnel using dedicated jigs and equipment, with everything 100% new for maximum longevity and optimum performance. After assembly each alternator is individually tested at the factory. Finally, it's boxed with a quality assurance graph that documents the specific unit's output performance. We do the testing, not you! And PROFORM proves it!
Additional Fitment Information:
| Vehicle | Block | CC | Engine | Sub Model | CID |
|---|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 7.4L | Sierra Grande | 454 |
- Alternator; 100 AMP; GM 1 Wire Style; Machined Pulley; Chrome Finish; 100% New
- Amperage Output:100 AMP; Case Style:10SI Style; Finish:Chrome
- Alternator; 100 AMP Model; GM 10si 1 Wire Style With Internal Regulator; Machined Pulley; Chrome Finish; 100% New; Products; Sold Individually
- Product Attributes:
- Voltage: 12 Volt
- Category: Alternators
- Pulley Diameter: 2 1/2 Inch
- Feature/Benefit: This Alternator Can Be Clocked To All Four Positions By The User.
- Applications: Chevy Small Block 305 To 350 Engines 1972 To 1987; Chevy Big Block 402 To 454 Engines 1970 To 1986; Pontiac 326 To 455 Engines 1962 To 1979; Oldsmobile 215 To 455 Engines 1963 To 1984; Buick 215 To 455 Engines 1963 To 1977
- Part Type: Alternator
- Wire Type: 1-wire
- Case Style: 10si Style
- Regulator Type: Internal
- Amperage Output: 100 Amp
- Can you tell the difference? Most chrome alternators look nearly the same, and that's why what's on the inside is so critical. Reliability starts with how it's made. Choosing PROFORM means choosing alternators with components produced by highly specialized machines, assembled by highly trained personnel using dedicated jigs and equipment, with everything 100% new for maximum longevity and optimum performance. After assembly each alternator is individually tested at the factory. Finally, it's boxed with a quality assurance graph that documents the specific unit's output performance. We do the testing, not you! And PROFORM proves it!
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 7.4L | 454 |
- High-Torque Starter; Gear Reduction Type; 1.4KW; Fits Chevy V8-V6 Engines
- High-Torque Starter; Gear Reduction Type; 1.4KW; Compression Ratio:11 : 1; Finish:Natural; Flywheel Tooth Number:153 and 168-Tooth; Gear Reduction Ratio:3.75:1; Material:Aluminum/Steel; Mounting Plate:Straight Bolt Mounting Plate
- High-Torque Mini Starter; Gear Reduction Type; 1.4KW; Fits All Chevy V8 Engines; Billet Aluminum Mount; For 11.1:1 Compression Ratio Engines; 100% New Components; Offset Design for More Oil Pan Clearance; Black and Silver Finish; Sold Each
- Product Attributes:
- Rotation: Standard
- Gear Reduction Ratio: 3.75:1
- Category: Starters
- Power Output: 1.4 Kw
- Feature/Benefit: High-torque, Gear-reduction Design.
- Applications: Chevy Small Block Engines, Chevy Big Block Engines And Chevy V6 Engines
- Compression Ratio: 11 : 1
- Mounting Plate: Straight Bolt Mounting Plate
- Part Type: Starter Motor
- Flywheel Tooth Number: 153 & 168-tooth
- Make: Chevrolet
- High-torque, gear-reduction design. 100% NEW, not rebuilt. Offset design results in more clearance between the oil pan and the starter, and can be rotated for additional chassis clearance. The high-torque, high-output motor spins the engine over faster than stock starters, delivering 40-50% more cranking power. 3.75-to-1 sealed gear-reduction drive and full ball bearing construction. Includes shims to set pinion-gear engagement (when necessary). Approved by all leading sanctioning organizations. Fits all Chevy V6 and small and big block V 8 engines using 153 or 168 tooth flywheels. Heavy-duty PROFORM P/N 66258 weighs 1-1/2 lbs. more and is 1" longer than P/N 66256.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 7.4L | 454 |
- Transmission Dipstick Kit; Locking; GM TH400 Trans; Includes Tube and Dipstick
- Locking; Includes Tube and Dipstick
- Transmission Dipstick Kit; Locking; Black Finish; Fits GM TH400 Transmissions; Includes Tube and Dipstick; Made from High-Quality Steel Material; Sold as One Kit
- Product Attributes:
- Transmission Type: Turbo 400
- Category: Transmission
- Feature/Benefit: ...because Nhra Says So.
- Applications: Gm Th400 Transmission
- Part Type: Transmission Dipstick
- Style: Locking
- Dipstick Location: Passenger Side
- Make: Gm
- ...because NHRA says so. No more tranny blowouts and fluid on the track with this affordable locking trans dipstick. Black finish. Computer formed for precise fit.
Additional Fitment Information:
| Vehicle | Transmission Manuf. Code |
|---|---|
| 1977 - GMC C25 | THM400 |
- Electric Engine Water Pump; Aluminum; Blue Powder Coat; Fits SB Chevy Engines
- Electric Engine Water Pump; Aluminum;Fits SB Chevy Engines; Finish:Blue
- Electric Engine Water Pump; Fits Small Block Chevy Engines; Made From Die Cast Aluminum; Body Has Blue Finish and Motor Has Black Finish; Flows 35 GPM; Billet 1.0 Inch NPT to 1-3/4 Inch Hose Fitting Included; Sold Individually
- Product Attributes:
- Rotation: Standard
- Category: Water Pumps
- Feature/Benefit: Affordable Electric Water Pumps Eliminate Unnecessary Weight And Impeller Drag Experienced At High Rpm, Pumps Up To 35+ Gallons Of Water Per Minute, And Delivers The Cooling That Can Make The Difference Between A Win And Second Place!
- Length: 6.5 Inch
- Applications: Chevy Small Block Engines
- Engine: Chevy Sb Gen 1
- Flow Rate: 35 Gpm
- Part Type: Water Pump
- Pump Flow: 35 Gpm
- Condition: New
- Make: Chevrolet
- Ever consider going electric? PROFORM's affordable electric water pumps eliminate unnecessary weight and impeller drag experienced at high RPM, pumps up to 35+ gallons of water per minute, and delivers the cooling that can make the difference between a win and second place! Durable but light-weight die-cast aluminum, epoxy powder coated for corrosion resistance in the color of your choice. Race or street. Comes with mating weather-tight connector. Draws 6 amps. Billet fitting (1in pipe to 1 3/in hose) included.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 5.0L | 305 |
- Electric Engine Water Pump; Aluminum; Black Powder Coat; Fits SB Chevy Engines
- Electric Engine Water Pump; Aluminum;Fits SB Chevy Engines; Finish:Black
- Electric Engine Water Pump; Fits Small Block Chevy Engines; Made From High-Quality Die Cast Aluminum; Black Powder Coat Finish; Flows 35 GPM; Billet 1.0 Inch NPT to 1-3/4 Inch Hose Fitting Included; Sold Individually
- Product Attributes:
- Rotation: Standard
- Category: Water Pumps
- Feature/Benefit: Affordable Electric Water Pumps Eliminate Unnecessary Weight And Impeller Drag Experienced At High Rpm.
- Length: 6.5 Inch
- Applications: Chevy Small Block Engines
- Engine: Chevy Sb Gen 1
- Flow Rate: 35 Gpm
- Part Type: Water Pump
- Pump Flow: 35 Gpm
- Condition: New
- Make: Chevrolet
- Ever consider going electric? PROFORM's affordable electric water pumps eliminate unnecessary weight and impeller drag experienced at high RPM, pumps up to 35+ gallons of water per minute, and delivers the cooling that can make the difference between a win and second place! Durable but light-weight die-cast aluminum, epoxy powder coated for corrosion resistance in the color of your choice. Race or street. Comes with mating weather-tight connector. Draws 6 amps. Billet fitting (1in pipe to 1 3/hose) included.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 5.0L | 305 |
- High-Torque Starter; Gear Reduction Type; 2.2KW; Fits Chevy V8-V6 Engines
- High-Torque Starter; Gear Reduction Type; 2.2KW; Compression Ratio:15 : 1; Finish:Natural; Flywheel Tooth Number:153 and 168-Tooth; Gear Reduction Ratio:3.75:1; Material:Aluminum/Steel; Mounting Plate:Straight Bolt Mounting Plate
- High-Torque Mini Starter; Gear Reduction Type; 2.2KW; Fits All Chevy V8-V6 Engines; Billet Aluminum Mount; For 15.1:1 Compression Ratio Engines; 100% New Components; Offset Design for More Oil Pan Clearance; Sold Each
- Product Attributes:
- Rotation: Standard
- Gear Reduction Ratio: 3.75:1
- Category: Starters
- Power Output: 2.2 Kilo Watts
- Feature/Benefit: High-torque, Gear-reduction Design.
- Applications: Chevy V6 Engines, Chevy Small Block Engines And Chevy Big Block Engines
- Compression Ratio: 15 : 1
- Mounting Plate: Straight Bolt Mounting Plate
- Part Type: Starter Motor
- Flywheel Tooth Number: 153 & 168-tooth
- Make: Chevrolet
- High-torque, gear-reduction design. 100% NEW, not rebuilt. Offset design results in more clearance between the oil pan and the starter, and can be rotated for additional chassis clearance. The high-torque, high-output motor spins the engine over faster than stock starters, delivering 40-50% more cranking power. 3.75-to-1 sealed gear-reduction drive and full ball bearing construction. Includes shims to set pinion-gear engagement (when necessary). Approved by all leading sanctioning organizations.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 7.4L | 454 |
- Transmission Dipstick Kit; Locking; GM TH350 Trans; Includes Tube and Dipstick
- Locking; Includes Tube and Dipstick
- Transmission Dipstick Kit; Locking; Black CED Finish; Fits GM TH350 Transmissions; Includes Tube and Dipstick; Made from High-Quality Steel Material; Sold as One Kit
- Product Attributes:
- Transmission Type: Turbo 350
- Category: Transmission
- Feature/Benefit: ...because Nhra Says So.
- Applications: Gm Th350 Transmission
- Part Type: Transmission Dipstick
- Style: Locking
- Dipstick Location: Passenger Side
- Make: Gm
- ...because NHRA says so. No more tranny blowouts and fluid on the track with this affordable locking trans dipstick. Gold iridite finish. Computer formed for precise fit.
Additional Fitment Information:
| Vehicle | Transmission Manuf. Code |
|---|---|
| 1977 - GMC C25 | THM350 |
- Electric Engine Water Pump; Aluminum; Black Powder Coat; Fits BB Chevy Engines
- Electric Engine Water Pump; Aluminum;Fits BB Chevy Engines; Finish:Black
- Electric Engine Water Pump; Fits Big Block Chevy Engines; Made From High-Quality Die Cast Aluminum; Black Powder Coat Finish; Flows 35 GPM; Billet 1.0 Inch NPT to 1-3/4 Inch Hose Fitting Included; Sold Individually
- Product Attributes:
- Rotation: Standard
- Category: Water Pumps
- Feature/Benefit: The New Chevy Big-block Electric Water Pump Features A Durable 12-volt Motor Pumping Up To 35+ Gallons Of Water Per Minute.
- Length: 7 Inch
- Applications: Chevy Big Block Engines
- Engine: Chevy Big Block
- Flow Rate: 35 Gpm
- Part Type: Water Pump
- Pump Flow: 35 Gpm
- Condition: New
- Make: Chevrolet
- The new Chevy big-block electric water pump features a durable 12-volt motor pumping up to 35+ gallons of water per minute. Each pump is made from durable but light-weight die-cast aluminum with epoxy powder coating for corrosion resistance. Comes with FREE billet aluminum inlet fitting, and mating weather-tight connector. Draws 6 amps.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 7.4L | 454 |
- High-Torque Starter; Gear Reduction Type; High Compression; Chevy V8; 168 Tooth
- High-Torque Starter; High Compression; Compression Ratio:14 : 1; Finish:Natural; Flywheel Tooth Number:168-Tooth; Gear Reduction Ratio:4.41:1; Material:Aluminum/Steel; Mounting Plate:Staggered Bolt Mounting Plate; Power Output:1.9 Kilo Watts
- High-Torque Mini Starter; Gear Reduction Type; High Compression Racing Staggered Style; Fits All Chevy V8 Engines with 168 Tooth Flywheel; Staggered Mount; For 14:1 Compression Ratio; 100% New; Offset For Pan Clearance; Natural Finish
- Product Attributes:
- Rotation: Standard
- Gear Reduction Ratio: 4.41:1
- Category: Starters
- Power Output: 1.9 Kilo Watts
- Feature/Benefit: For Engines With Monster Cubic Inches Or Compression Ratios, These 100% New Starters Challenge The Specifications, Durability, And Reliability Of Anything On The Market.
- Applications: Chevy Small Block Engines And Chevy Big Block Engines
- Compression Ratio: 14 : 1
- Mounting Plate: Staggered Bolt Mounting Plate
- Part Type: Starter Motor
- Flywheel Tooth Number: 168-tooth
- Make: Chevrolet
- For engines with monster cubic inches or compression ratios, these 100% NEW starters challenge the specifications, durability, and reliability of anything on the market. Built from scratch with all-new components, the torque rating is a healthy 4.41:1 gear reduction, capable of cranking engines up to a whopping 14:1 compression. Comes in the NEW Race Box Packaging! Fits Chevy small and big block engines. Fits Chevy V8.
Additional Fitment Information:
| Vehicle | Block | CC | Engine | CID |
|---|---|---|---|---|
| 1977 - GMC C25 | V | - | 8 Cyl 7.4L | 454 |
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