PIT5195

Bulletin No.: PIT5195
Date: Jan-2013
Subject:
Speedometer Needle Accuracy Information
Models:
2003-2013 Cadillac Escalade Models
2003-2013 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003-2013 GMC Sierra, Yukon Models
Condition/Concern
A customer may comment that their vehicle's speedometer needle appears to be inaccurate. The speedometer needle is electrically operated by a stepper
motor and there may be some variation in accuracy. Digital readout devices, such as "Digital Speedometer" on the DIC, are direct readouts of the Vehicle
Speed Sensor (VSS) and their accuracy is much greater. Tire size, tread life and inflation may cause some variation in the readings.
Recommendation/Instructions
The specification for speedometer needle accuracy is +/- 2 MPH at any given speed when looking straight at the needle.
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.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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