Express 3/4 Ton Van V8-4.8L VIN V (2003)
Pitman Arm: Customer Interest
Steering/Suspension - Front End Clunking On Turns
Bulletin No.: 06-02-34-001
Date: July 14, 2006
TECHNICAL
Subject:
Clunking Noise in Front End On Turns (Reposition Idler Arm and Power Steering Gear Box)
Models:
2003-2006 Chevrolet Express 2500/3500 Series Vans
2003-2006 GMC Savana 2500/3500 Series Vans
Condition
Some customers may comment on a clunk noise on turns. Also the customer may have been advised during a state vehicle inspection to return to the
dealer for a front end inspection.
Cause
This noise may be the inner right tie rod making contact with the frame on left turns.
Correction
Inspect for wear / damage in the idler arm / pitman arm and the inner tie rod. If necessary, replace the parts. If a clunking noise is present when turning
left, follow the procedure below.
1.
Raise and support the vehicle.
2.
Remove the engine protection shield.
3.
Remove the two 10 mm bolts, the two 13 mm nuts and swing the sway bar down to gain access.
4.
Turn the wheel 11 degrees to the left and the right, lining up the inner frame rail with the tie rod end boot as seen in the illustration above. Measure
the distances between the inner frame rail and tie rod end. If the measurement is less than 14 mm (0.55 in), an adjustment will have to be made.
5.
If the idler arm side needs adjustment, remove the idler arm. Refer to Idler Arm Replacement in SI.
6.
Put the idler arm in a vice and use a 5/8 or 16 mm drill bit and enlarge the lower hole in the idler arm.
