Gas peddle issue - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**gmc 2500 4x4** · 07-27-2024, 08:46 AM

Is there any differences in gas peddles on a 71/72 auto /4spd trucks? Its a 71 stick cab. Has a 402 in it , I've changed cables long and short and still not getting a full peddle when mashed to the floor. Truck has oem carpet also. Any info will help before I tweak the peddle

**1970cstblazer** · 07-27-2024, 09:24 AM

Trucks with the manual throttle dash control have a different pedal. The main concern is correct cable length for the application.

**gmc 2500 4x4** · 07-27-2024, 09:38 AM

I've tried the long and short. No difference at the peddle. How about carb bracket for the cable, I'm using the one for the 402.

**Dashman** · 07-27-2024, 09:51 AM

If you're not using the stock carburetor and linkage bracket, your engine is mounted differently, or different engine, then you'll need to modify a throttle cable.

I used this website, and called them to verify the carburetor linkage bracket and firewall ends:

https://pioneerautoinc.com/cables/accelerator-cables

Maybe you find the exact cable for a stock setup.

I installed it into the carburetor linkage and firewall, set the pedal where I wanted it to be, cut the cable, and crimped on a new cable stop. I believe I found the cable stops on Ebay. Good luck.

**gmc 2500 4x4** · 07-27-2024, 09:58 AM

Yup its one of those things, your way sounds best

**Dashman** · 07-27-2024, 11:54 AM

I forgot to mention that I shopped for a throttle cable that was slightly longer jacket and cable. I first cut the pedal end of the cable off and removed it from the jacket. I cut the jacket near one of the fittings, then I drilled out the plastic and wire from the fitting. It's best to cut the jacket with a high speed cutting wheel. You could use a plastic epoxy to re-join the jacket to the fitting. I fabricated my own crimper out of two pieces of 1/4" steel. I clamped them together and drilled a hole at the seam slightly smaller than the crimp end, I used another piece of steel clamped to both pieces to hold them together, and then I used a press to do the crimping. There's videos on YouTube that show how other's have done it.

**dmjlambert** · 07-27-2024, 07:46 PM

On the carburetor throttle lever, if there is a hole closer to the pivot point to attach the cable, that will move the throttle over a greater range.

07-27-2024, 08:46 AM	#1
gmc 2500 4x4 Senior Member Join Date: Mar 2012 Location: ripley ny Posts: 2,970	Gas peddle issue Is there any differences in gas peddles on a 71/72 auto /4spd trucks? Its a 71 stick cab. Has a 402 in it , I've changed cables long and short and still not getting a full peddle when mashed to the floor. Truck has oem carpet also. Any info will help before I tweak the peddle

07-27-2024, 09:24 AM	#2
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,825	Re: Gas peddle issue Trucks with the manual throttle dash control have a different pedal. The main concern is correct cable length for the application. __________________ 1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion.. 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels

07-27-2024, 09:38 AM	#3
gmc 2500 4x4 Senior Member Join Date: Mar 2012 Location: ripley ny Posts: 2,970	Re: Gas peddle issue I've tried the long and short. No difference at the peddle. How about carb bracket for the cable, I'm using the one for the 402.

07-27-2024, 09:51 AM	#4
Dashman Active Member Join Date: Apr 2021 Location: Santa Cruz, NM Posts: 114	Re: Gas peddle issue If you're not using the stock carburetor and linkage bracket, your engine is mounted differently, or different engine, then you'll need to modify a throttle cable. I used this website, and called them to verify the carburetor linkage bracket and firewall ends: https://pioneerautoinc.com/cables/accelerator-cables Maybe you find the exact cable for a stock setup. I installed it into the carburetor linkage and firewall, set the pedal where I wanted it to be, cut the cable, and crimped on a new cable stop. I believe I found the cable stops on Ebay. Good luck.

07-27-2024, 09:58 AM	#5
gmc 2500 4x4 Senior Member Join Date: Mar 2012 Location: ripley ny Posts: 2,970	Re: Gas peddle issue Yup its one of those things, your way sounds best

07-27-2024, 11:54 AM	#6
Dashman Active Member Join Date: Apr 2021 Location: Santa Cruz, NM Posts: 114	Re: Gas peddle issue I forgot to mention that I shopped for a throttle cable that was slightly longer jacket and cable. I first cut the pedal end of the cable off and removed it from the jacket. I cut the jacket near one of the fittings, then I drilled out the plastic and wire from the fitting. It's best to cut the jacket with a high speed cutting wheel. You could use a plastic epoxy to re-join the jacket to the fitting. I fabricated my own crimper out of two pieces of 1/4" steel. I clamped them together and drilled a hole at the seam slightly smaller than the crimp end, I used another piece of steel clamped to both pieces to hold them together, and then I used a press to do the crimping. There's videos on YouTube that show how other's have done it.

07-27-2024, 07:46 PM	#7
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,859	Re: Gas peddle issue On the carburetor throttle lever, if there is a hole closer to the pivot point to attach the cable, that will move the throttle over a greater range.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.