Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 136 (ENGINE CONTROLS - ON-VEHICLE ADJUSTMENTS)IDLE SPEED & MIXTUREACCELERATOR CABLE ADJUSTMENT2.5L
1999 GMC Forward Control 5.7 R, Automatic
Accelerator Cable Adjustment: 2.5L
1999 GMC Forward Control 5.7 R, AutomaticSECTION 2.5L
WARNING: This page is about a different car, the 2003 Chevrolet Tracker. However, it is still accessible from the selected car via links, so may be relevant.
- Start and operate engine to normal operating temperature. Check accelerator pedal free play with throttle valve closed. Accelerator pedal free play clearance should be.08-.27" (2-7 mm). See Figure. To adjust accelerator pedal free play, loosen accelerator cable lock nut at throttle body bracket. See Fig 1. Turn accelerator cable adjusting nut until free play is within specification. Install and tighten accelerator cable lock nut to 17 ft. lbs. (23 N.m).
- Check clearance between throttle lever and throttle stop with accelerator pedal fully depressed. Accelerator cable end play clearance should be.02-.07" (0.5-2.0 mm). See Fig 2. To adjust accelerator cable end play, adjust height of accelerator pedal stop. See Figure.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.