TSB 09-03-09-002 (S: Suspension - Rear Leaf Spring Noise On Acceleration

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TECHNICAL Bulletin No.: 09-03-09-002A Date: April 08, 2011 Subject: Noise from Rear Leaf Spring Under Acceleration and High Loads (Replace Rear Leaf Spring Shackle ) Models: 2006-2012 Chevrolet Express 2006-2012 GMC Savana Commercial Cutaway Vans - G33503, G33803, G33903 Supercede: This bulletin is being revised to add the 2011 and 2012 model years. Please discard Corporate Bulletin Number 09-03-09-002 (Section 03 - Suspension ). Condition Some customers may comment on a noise from the rear of the vehicle. Upon Investigation, the technician may find the left and right shackle lower bushings are worn/ torn. This creates a metal to metal contact. Correction 1. Verify the condition. 2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI. 3. Support the rear axle independently in order to relieve the tension on the leaf springs. 4. Remove the leaf spring (1) to the spring shackle (5) mounting bolt and nut (3). Replace the leaf spring shackle with GM P/N 20773420. 5. Install the leaf spring (1) to the spring shackle (5) mounting bolt and nut (3). 6. Tighten the spring shackle to frame mounting nut. Tighten Tighten the nut to 115 Nm (85 lb ft). 7. Tighten the spring shackle to leaf spring mounting nut. Tighten Tighten the nut to 85 Nm (63 lb ft). 8. Remove the rear axle support. 9. Repeat the same procedure for the other side. 10. Lower the vehicle. Parts Information Warranty Information For vehicles repaired under warranty, use the table. Disclaimer