2003 Chevrolet Suburban 2500 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 Chevrolet Suburban 2500

2003 Chevrolet Suburban 2500 Problems

Power brake systems using "hydro-boost" may leak power steering fluid from the hydro-boost unit located behind the brake master cylinder. Replacement of the hydro-boost unit is the common repair to correct this concern.

The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.

The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.

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2003 Chevrolet Suburban 2500 Questions

My speedometer stop working on me

Ever since the dealer replaced my instrument cluster, the engine light will flash above 65 MPH if driven at a constant speed (random misfire). If I drive at various speed going from 60 to 70 back and forth, its fine. I took it to the dealer (another), and they can not find anything wrong with it....

INSTALLED A NEW TRANSFER CASE AND THE CODE THAT COMES UP IS CO306-MOTOR A/B CIRC MALFUNCTION. CO 321 T/C LOCK CIRC FAULT .... AND CO 327 ENCODER CIRCUIT MALFUNTION. THE SUV JUMPS AND HOPS ALMOST AS IF THERE ARE DIFFERENT SIZE TIRES OR THE WRONG GEAR RATIO IN IT . USEING THE SCANNER TO ACTIVATE TH...

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2003 Chevrolet Suburban 2500 Recalls

The second row center seat belt routing may make it difficult to position correctly on smaller passengers. If the seat belt rides up to fit around the abdomen, the risk of internal injury is increased in a crash. Dealers will cut the guide loop, remove a portion of the loop, and the remaining sides should be folded over and secured with a retainer. The recall began July 21, 2005. The GM recall number is 05037.

The hydro-boost housing relief valve bore may be out of specification. The seal may fracture as a result, which may reduce braking assist and slightly increase the steering effort while braking. Under certain conditions, more braking effort will be required to stop the vehicle. Dealers will replace the hydro-boost relief valve. The recall began June 18, 2004. The GM recall number is 04004.

The courtesy lamps on affected running boards may overheat when exposed to moisture and road salt. Overheating may cause the lamps and boards to melt or start a fire. Dealers will replace the wiring harness for these running boards.

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