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Shudder on Acceleration at Low Speed

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Shudder on Acceleration at Low Speed

Checks Action
DEFINITION: When the vehicle is accelerating at low speed a shudder occurs.
The yoke retainer strap bolts are loose or missing. Replace or tighten the yoke retainer strap bolts to specifications. Refer to Fastener Tightening Specifications .
The driveline joint angle is excessive or incorrectly set. Determine if the driveline angle is incorrect and correct as necessary. Refer to Diagnostic Starting Point - Vibration Diagnosis and Correction in Vibration Diagnosis and Correction.
One or more of the universal joints are worn or damaged. Replace the universal joint. Refer to the following:
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