NHTSA Complaint #11301470 — 2003 GMC ENVOY

WHEN TRAILER IS CONNECTED TO THE 7 WAY TO BOX TRAILER CONNECTION TRAILER TAIL LAMPS DO NOT LIGHT CORRECTLY. BRAKE AND LEFT TURN SIGNAL LAMPS WORK PROPERLY. THE RIGHT TURN TRAILER LAMP IS PARTIALLY LIT WHEN TURN SIGNAL IS NOT ENGAGED. WHEN RIGHT TURN SIGNAL IS ENGAGED THE LEFT AND RIGHT TURN SIGNALS START FLASHING, BRAKE LIGHTS WORK NORMAL. THIS TURN SIGNAL ISSUE APPLY ONLY WHEN TRAILER ELECTRIC CIRCUIT IS PLUNGED IN TO THE TRAILER CIRCUIT. MY UNDERSTANDING THERE WAS A RECALL REGARDING THE FLASHER UNIT FOR THE 2003 ENVOY VEHICLE TURN SIGNALS. IT APPEARS THE TRAILER CIRCUIT HAS A SIMILAR ISSUE. BOTH THE VEHICLE AND TRAILER WORK OFF THE SAME FLASHER MODULE. SEE RECALL 05V198000. I PLAN TO REPLACE THE FLASHER UNIT TO CORRECT THIS DEFECT. IF YOU NEVER TOWED A TRAILER THIS ISSUE WOULD NOT BE DISCOVERED. WHEN TOWING A TRAILER DRIVER COULD BECOME CONFUSED WHEN YOUR MAKING A RIGHT TURN. THIS POTENTIALLY COULD RESULT IN AN ACCIDENT. THE TRAILER USED WAS A 5X10 FOOT SINGLE AXLE BOX TRAILER WITH FOUR WIRE ELECTRICAL CIRCUIT. I HAD NO ISSUES WHEN TOWED WITH A DIFFERENT MAKE OF TRUCK. I DID REPLACED BOTH TRAILER TAIL LIGHT ASSEMBLY AND ISSUE DID NOT CHANGE.