Sierra 1500 2WD V8-5.3L (2008)
Truck Bed Cover Latch: All Technical Service Bulletins
Body - Tonneau Cover Fits To Loose On Vehicle
TECHNICAL
Bulletin No.: 09-08-66-003A
Date: December 23, 2010
Subject: One-Piece Hard Tonneau Cover Fits Loose on Vehicle or Rear Tonneau Latch Not Functioning Properly (Adjust Rear Latch and Align
Tonneau Cover)
Models:
2007-2011 Chevrolet Silverado
2007-2011 GMC Sierra
Supercede:
This bulletin is being revised to add the 2011 model year. Please discard Corporate Bulletin Number 09-08-66-003 (Section 08 - Body and Accessories).
Condition
Some customers may comment that the hard tonneau rear latch is not functioning properly or that the tonneau cover is loose on the vehicle, causing
noticeable movement during vehicle operation.
Cause
This condition may be caused by both sides of the latch not engaging or releasing at the same time, or the tonneau frame may be misaligned.
Correction
Note
The tonneau cover latches contain multiple design features to accommodate for build variation of the pickup box and tonneau cover.
Use the following repair process to obtain proper latch operation:
Inspect/Adjust Latch to Striker Loop Interface
Side to Side Adjustment
1. Lower the endgate.
2. Slowly lower the tonneau cover from the open to closed position. Use caution not to drop or slam the tonneau cover closed as this may damage the
latch assembly.
3. Inspect the fit of the latch into the striker loop just before the U-shaped catch is engaged. The latch should fit into the striker loop without
contacting any portion of the rear bracket or striker loop. If contact is observed, proceed with the following steps:
1. Loosen the two nuts of the rotary latch that is making contact to the striker loop assembly with a 7/16 inch wrench.
2. Slide the rotary latch side to side until the latch freely falls into the rear striker loop.
3. Tighten the rotary latch nuts to 2.26 Nm (20 lb in).
4. Inspect the operation of the latches by turning the twist handle. If the latches do not close or release properly, adjust the latch wire per the
Inspect/Adjust Latch Release Operation section of this document.
Up and Down Adjustment
1. Lower the endgate.
2. Close the tonneau cover by pushing down on the panel near the twist handle on the top of the tonneau cover.
3. Inspect the fit of the tonneau cover side seal to the pickup box. If the seal does not have complete contact, lower the striker loop until the seal has
complete contact using the following steps:
1. Loosen the two 1/4 inch nuts that hold the striker plate to the rear bracket.
2. Lower the striker loop.
3. Tighten the 1/4 inch nuts to 13.5 Nm (120 lb in).
4. Inspect for seal contact and repeat procedure as necessary.
4. Close the endgate.
5. Close the tonneau cover by pushing down on the panel near the twist handle on the top of the tonneau cover.
6. Inspect that both latches have engaged by lifting up on the corner of the tonneau.