1990 Chevrolet C2500

TL* THE CONTACT OWNS A 1990 CHEVROLET CHEYENNE 2500 WITH ACCC AMERICAN PROSPECT A/T TIRES, LINE SIZE 235/85R 16. THE CONTACT STATED THAT THE TWO FRONT TIRES SHREDDED AT THE SIDEWALL. THE CONTACT FOUND THAT THERE WAS A RECALL FOR THE TIRES. THE MANUFACTURER STATED THAT THE TIRES WERE NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER: 08T007000 (TIRES: SIDEWALL). THE FAILURE MILEAGE WAS UNAVAILABLE. THE VIN WAS UNAVAILABLE.

THIS IS A PROBLEM CENTERED ON THE ELECTRONIC SPEEDOMETER. APPROXIMATLY AT LEAST ONCE WITHIN EVERY 50 MILES THE SPEEDOMETER WILL FAIL. THE MOST DANGEROUS RESULT OF THIS FAILURE IS THE ANTI-LOCK BRAKE SYSTEM WHICH WILL LOCK UP THE REAR BRAKES IF THIS SITUATION (DISENGAGEMENT OF THE SPEEDOMETER) OCCURS AT THE SAME TIME AS BRAKING IS OCCURING!!!!!!! BRAKES FUNCTION NORMALY AFTER THE FAILURE HOWEVER. WITHOUT THE SPEEDOMETER FUNCTIONING THE DASHBOARD WARNINGS ALSO ENGAGE. I HAVE FOUND THAT A QUICK 'RAP' TO THE DASHBOARD WILL RE-ENGAGE THE SPEEDOMETER AND CURE THE PROBLEM. I BELIEVE THE SITUATION MAY BE CAUSED BY 'COLD SOLDER JOINTS' WHERE THE ORIGINAL SOLDER CONNECTIONS HAVE SEPARATED FROM THE POSTS ALLOWING INTERMITTANT CONNECTIONS. I DID ATTEMPT TO RE-SOLDER THE VISIBLE CONNECTIONS AT THE BACK OF THE DASHBOARD COMPONENT WITH MIXED RESULTS: THE PROBLEM APPEARS TO HAVE DIMINISHED FROM A LIKELY FAILURE OF WITHIN EVERY 10-20 MILES TO A LIKELY FAILURE WITHIN EVERY 50 MILES. AS STATED ABOVE, THIS IS A POTENTIALY DANGEROUS SITUATION AS BRAKE LOCK-UP CAN OCCUR DURING IT.*AK