You are here: Forums SUVs Chevrolet TrailBlazer Chevrolet TrailBlazer Engine and Performance Problems

Chevrolet TrailBlazer Engine and Performance Problems

36 messages,  Last post on Nov 20, 2009 at 9:28 AM

You are in the Chevrolet TrailBlazer Forum. Your Hosts are steve_ & tidester

What is this discussion about? Chevrolet TrailBlazer, Chevrolet TrailBlazer EXT, SUV

Messages Page 1 of 4 1 2 3 4 Prev Next Last

Go To Msg # Search This Discussion

#1 of 36 chevy trailblazer engine roar by pickup41 Dec 11, 2007 (5:48 pm)
03 trailblazer started with loud engine roar after thermostat replacement , no other signs or dash codes.Noise starts at 25 mph and on highway constant .Any ideas ?Similar problems, answers! Replies to this message: burdawg (Dec 11, 2007 8:01 pm) degonza (Dec 12, 2007 8:22 am) pickup41 (Dec 12, 2007 8:07 pm) burdawg (Dec 13, 2007 6:57 am) burdawg (Dec 14, 2007 1:39 pm) and 3 more...
#2 of 36 Re: chevy trailblazer engine roar [pickup41] by burdawg Dec 11, 2007 (8:01 pm)
Replying to: pickup41 (Dec 11, 2007 5:48 pm) Sounds like the fan clutch has failed or is not connected right. It's viscous on the TB and needs the control line connected. Replies to this message: degonza (Dec 12, 2007 8:22 am) pickup41 (Dec 12, 2007 8:07 pm) burdawg (Dec 13, 2007 6:57 am) burdawg (Dec 14, 2007 1:39 pm) pickup41 (Dec 16, 2007 5:00 pm) pickup41 (Dec 17, 2007 5:27 am) and 1 more...
#3 of 36 Re: chevy trailblazer engine roar [burdawg] by degonza Dec 12, 2007 (8:22 am)
Replying to: burdawg (Dec 11, 2007 8:01 pm) Mine made a similar noise. Turned out to be the pulley on the A/C compressor. Does it change pitch when you turn the A/C on, then thats it. I changed the fan clutch and the idle pulley before I found the right problem. New compressor is $600 new and $200 used at the junkyard. Good Luck
#4 of 36 Re: chevy trailblazer engine roar [burdawg] by pickup41 Dec 12, 2007 (8:07 pm)
Replying to: burdawg (Dec 11, 2007 8:01 pm) Could this be related to the thermostat replacement that was done?And where is the control line located ? Replies to this message: burdawg (Dec 13, 2007 6:57 am) burdawg (Dec 14, 2007 1:39 pm) pickup41 (Dec 16, 2007 5:00 pm) pickup41 (Dec 17, 2007 5:27 am) dpratl (Jan 07, 2008 2:34 pm)
#5 of 36 Re: chevy trailblazer engine roar [pickup41] by burdawg Dec 13, 2007 (6:57 am)
Replying to: pickup41 (Dec 12, 2007 8:07 pm) Hard for me to say if it's related or not. Depends on what was removed to get at the thermostat. If memory serves, the control cable for the fan clutch runs horizontal along the drivers side of the rear of the radiator, along a plastic boss that supports the whole assembly. If you can see it (I don't recall how much is visible) then maybe you can verify if it's connected.
#6 of 36 Re: chevy trailblazer engine roar [pickup41] by burdawg Dec 14, 2007 (1:39 pm)
Replying to: pickup41 (Dec 12, 2007 8:07 pm) Minor update. The wiring runs at about a 45 angle from the top right of the shroud (assuming your standing in front of the car looking down at the top of the radiator/shroud) between the fan and the radiator. It runs in kind of a conduit. The top connector is on the top right of the shroud from the same view. Replies to this message: pickup41 (Dec 16, 2007 5:00 pm) pickup41 (Dec 17, 2007 5:27 am) dpratl (Jan 07, 2008 2:34 pm)
#7 of 36 Re: chevy trailblazer engine roar [burdawg] by pickup41 Dec 16, 2007 (5:00 pm)
Replying to: burdawg (Dec 14, 2007 1:39 pm) Thanks for the updated info I checked connection and it is secure,I guess its time to visit the dealer. Thermostat at 55 K $297 ,strange sound at 56 K priceless!!!
#8 of 36 Re: chevy trailblazer engine roar [burdawg] by pickup41 Dec 17, 2007 (5:27 am)
Replying to: burdawg (Dec 14, 2007 1:39 pm) Second thought,what could happen if I wait for 500 more miles before taking it in ?The fan clutch won't seize or could it. Thanks Replies to this message: dpratl (Jan 07, 2008 2:34 pm)
#9 of 36 2002 Trailblazer - New Engine at 85,000 miles - ouch! by mom2teach Dec 26, 2007 (10:15 pm)
Hi, I've been reading through your forums looking for a solution to my big problem - our 2002 Trailblazer with 85,000 miles and regular maintenance basically blew up last week with no warning from the gauges. The dealer took apart the engine (I had found the cylinder recall online), but says a blown head gasket caused the problem. We already had the head gasket replaced at 36,000 miles, that time with bells and lights and everything flashing and dinging...this time, NO warning. Any ideas? We already have calls into GMC and are talking with someone who is nice so far...this is going to be over $6000 - Merry Christmas Replies to this message: clickytb (May 16, 2009 9:30 pm) akhenaten (May 17, 2009 6:04 am) burdawg (May 18, 2009 6:11 am) hineblazer (Jun 11, 2009 6:29 am)
#10 of 36 Re: chevy trailblazer engine roar [pickup41] by dpratl Jan 07, 2008 (2:34 pm)
Replying to: pickup41 (Dec 17, 2007 5:27 am) pickup41 -   Any update on your TB. I'm having the same problem as you. I recently had the thermostat replaced and noticed a roar from the engine as well. I hear and feel the roar when I accelerate hard, like when I'm merging onto the expressway.   Prior to having the thermostat repalced I had no problems (105k miles).   Looks like a trip back to the dealer.

Messages Page 1 of 4 1 2 3 4 Prev Next Last

Go To Msg # Search This Discussion

You are here: Forums SUVs Chevrolet TrailBlazer Chevrolet TrailBlazer Engine and Performance Problems