2006 CHEVROLET TRAILBLAIZER: UPON COLD START IGNITION, THERE IS A "VIBRATION" SOUND COMING FROM THE RIGHT ENGINE AREA. COLD RUNNING, WHEN SHIFTS INTO REVERSE, THE NOISE SOUNDS AGAIN. COLD RUNNING, WHEN MOVING THE NOISE SOUNDS AGAIN WHEN SHIFTING INTO 2ND, BUT LOUDER WHEN SHIFTING INTO 3RD. AFTER THE CYCLE GOES THROUGH ONE TIME, THE NOISE IS NOT HEARD AGAIN. IF THE TEMPERATURE OUTSIDE IS BELOW 60 DEGREES, THE NOISE IS HEARD UPON START UP, REVERSE, AND DRIVING SHIFTING INTO 2ND & 3RD GEARS. IF THE TEMPERATURE IS ABOVE 60 DEGREES I DO NOT HEAR THIS VIBRATION NOISE. I WARM UP THE VEHICLE BEFORE MOVING, SO I DON'T HEAR THIS NOISE, BUT SOMETIMES THE "WARM UP" DOESN'T MATTER IF THE TEMP IS BELOW 60 DEGREES. PLEASE HELP
COLD START NOISE on 2006 Chevrolet Trailblazer
by csrcbp in Ville Platte, LA on January 14, 2013
ANSWER by Tomiko on January 14, 2013
maybe oil pressure is low
The temperature does not matter. The noise winds down and disappears after about a minute. There is no code. The dealership and OnStar were zero help.
PO526 my mechanic said was either the fan clutch or the harness going bad. Had no temp issues and fan seemed to be working fine. Replaced both fan clutch and harness. Now sounds like plane takin...
I'm hearing a high-pitched squeal/whistle. It usually starts happening after I've been running the car for a while and will go away completely if I drive a lot that day. The squeal starts up when...
when i first start from cold there will be a knock or bang like noise then truck idles and runs fine never any problem with acceleration or shifting what could this knock be. Thanks