Left turn signal causes the turn signals to act as hazard signals preventing other drivers from knowing the truck is turning left. There is a know recall coering this issue with 03 SUVS and trucks, but Chevy states it does not effect my truck. Here is the recall from the internet." On certain trucks and sport utility vehicles, the driver wishing to signal a turn by moving the directional signal lever, (up or down) may cause the front marker/turn lights and rear turn lights to flash in a manner similar to hazard warning, rather than flashing on the desired side only. Defect consequence: The driver may not be able to clearly signal their intentions to turn, change travel lanes, or potentially warn others of an impaired vehicle operating condition increasing the risk of a crash. Remedy: Dealers will replace the suspect flasher modules with a new flasher module designed with sealed relays and more durable contact material inside of the relays free of charge. The recall began on August 4, 2005. Isuzu began mailing owner letters on August 4, 2005. Owners may contact Chevrolet at 1-800-630-2438, GMC at 1-866-996-9463, Isuzu at 1-800-255-6727, Buick at 1-866-608-8080, and Oldsmobile at 1-800-630-6537. Notes: General Motors Corp., 05044

- Portland, OR, USA