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Chevrolet TrailBlazer Engine and Performance Problems

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

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#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.
#11 of 36 shutting off and surging by johnny83 Mar 24, 2008 (11:58 am)
I have an 05 tb with the I6. When I turn on the air or heat it surges almost like it is idled too low. The mechanic said it sounded like the compressor trying to lock up but I was woundering if it could be a idle sensor or something?
#12 of 36 2002 trailblazer LT Clutch Fan by justanote Mar 25, 2008 (6:43 am)
Can someone tell me if the 2002 trailblazer 6 cylinder clutch fan has one with no electrical connections. I seem to be finding clutch fans on the net with the electrical connections attached. Hubby says the clutch fan runs off the motor with no electrical wires. Does anyone know what the part number would be. I'm confused and looking for this clutch fan. Replies to this message: burdawg (Mar 25, 2008 7:56 am)
#13 of 36 Re: 2002 trailblazer LT Clutch Fan [justanote] by burdawg Mar 25, 2008 (7:56 am)
Replying to: justanote (Mar 25, 2008 6:43 am) The fan clutch on the I6 engine is electrically controlled, so they will all have a connection. This is done to more tightly control the operation of the large cooling fan and reduce the amount of drag put on the engine by the fan when it's not needed. The end result is better fuel mileage which is of course mandated by the federal government.
#14 of 36 2002 trailblazer fan clutch by justanote Apr 01, 2008 (1:07 pm)
When the new one arrived, it is stiff when trying to turn it, just like the one one the truck. Is is suppose to be stiff (not turn freely). Thanks, Replies to this message: burdawg (Apr 02, 2008 7:03 am)

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