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2001 - 2002 Corvette: Service Bulletin: SMU - Revised DTC P1221

Source: Chevrolet Dealer Service Bulletin
Number: 02-06-04-005
Subject: SMU - Revised DTC P1221
Model Year: 2001-2002

Revised DTC P1221
2001-2002 Chevrolet Corvette

2001 Chevrolet and GMC C/K Pickup and Utility Models (Silverado, Sierra, Sierra C3, Suburban, Tahoe, Yukon, Yukon XL)

2001 Chevrolet and GMC G-Van Models (Express, Savana)

2001-2002 Chevrolet and GMC 3500 HD Models

2001-2002 Chevrolet and GMC C-Series Medium Duty Conventional Cab Models

2001-2002 Chevrolet and GMC B7 Medium Duty School Bus Models

With 4.8L, 5.3L, 5.7L, 6.0L or 8.1L Engine (VINs V, T, G, S, U, G -- RPOs LR4, LM7, LS1, LS6, LQ4, L18)

This bulletin is being issued to revise step 2 of DTC P1221 in the Engine Controls sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.

The following information has been updated within SI2000. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.

The text "DTC P1515" has been deleted in step 2. Step 2 of this diagnostic table should read as follows:






Is DTC P1518 also set?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

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