Supporting Vendors / Dealers - Advertising - Shop

2006 Corvette: Service Bulletin: Automatic Transmission, Busy Shifting, MIL Illuminated, DTC P1751

Service Bulletin #:  1741321

Date: December 9, 2005

Subject:  Automatic Transmission, Busy Shifting, MIL Illuminated, DTC P1751

Model(s): 2006 Chevrolet Corvette, 2006 Cadillac XLR-V and STS-V, 2007 Cadillac Escalade, 2007 GMC Yukon

Equipped with 6L80 (RPO - MYC) Automatic Transmission

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customers may experience busy or frequent up and down shifts in 3rd, 4th, 5th or 6th gear at approximately 30-50 mph. The MIL may also be illuminated and a DTC P1751 stored in the TCM.

These conditions may be caused by an undersized hole or debris in the control valve body spacer plate.

To correct this condition the control valve body spacer plate must be replaced. These parts are not currently available from GMSPO and must be obtained by contacting Technical Assistance. If the control valve body spacer plate is required a complete valve body assembly including TCM will be sent to the dealer at no charge.

Service Procedure
Refer to SI document # 1670458 - Control Valve Lower and Upper Body Replacement for the proper procedure. The TCM must be programmed after installation of the control valve body assembly, refer to SI document # 1466621 - Transmission Control Module Programming and Setup. Service Fast Learn Adapts must also be run, refer to SI document # 1688788 for that procedure.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.

© Copyright General Motors Corporation. All Rights Reserved

0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Security Code Security Code
Related Articles RSS Feed
1993 - 2005 Corvette: Service Bulletin: No Reverse, Second Gear or Fourth Gear (Replace Reaction Sun Shell with More Robust Heat Treated Parts)
Viewed 1361 times since Wed, Jul 23, 2014
2005 Corvette: Service Bulletin: Malfunction Indicator Lamp (MIL), Diagnostic Trouble Code (DTC) P0833, Cruise Control Inoperative (Adjust Clutch Release Switch)
Viewed 4493 times since Fri, Jul 18, 2014
2005 - 2007 Corvette: Service Bulletin: Intermittent Spongy Clutch Pedal Sticking To The Floor During Hard Acceleration And High RPM Shifts
Viewed 5830 times since Sun, Jul 13, 2014
2000 - 2006 Corvette: Service Bulletin: Diagnostic Information on Diagnostic Trouble Code (DTC) P0894 and P1870
Viewed 3508 times since Tue, Jul 15, 2014
2005 - 2007 Corvette: Service Bulletin: Information on 2-3 Upshift or 3-2 Downshift Clunk Noise
Viewed 1067 times since Mon, Jul 14, 2014
2004 - 2007 Corvette: Service Bulletin: Engine and Automatic Transmission/Transaxle Identification
Viewed 1309 times since Mon, Jul 14, 2014
2007 Corvette: Service Bulletin: 6L80 Busy Shifting 30-50mph
Viewed 895 times since Mon, Jul 14, 2014
2006 - 2008 Corvette: GM TechLink: 6L80 or 6L90 Automatic Transmission Shift Conditions
Viewed 3250 times since Thu, Jul 3, 2014
2006 Corvette: Service Bulletin: Diagnosis of Cracked or Broken Transmission Case
Viewed 1034 times since Tue, Jul 15, 2014
2005 - 2007 Corvette: Service Bulletin: Information on Driveline Clunk Noise When Shifting Between PARK and DRIVE, PARK and REVERSE or DRIVE and REVERSE
Viewed 2654 times since Mon, Jul 14, 2014