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Chevrolet Trailblazer Maintenance and Repair

533 messages,  Last post on Aug 30, 2008 at 12:14 PM

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#473 of 533 Recommendation for Synthetic Oil by deerhunter3 Feb 22, 2008 (7:47 pm)
We own a 2004 Chevy Trailblazer LS, 6 cylinder - inline, 4WD, that has about 45,000 miles on it. We live in the central/southern part of Nebraska. We are using 5W30 Quaker State Oil in it right now and are getting about 16 miles to the gallon. We change oil about every 3000 miles. We would like to get better gas mileage out of it. It was recommended to us that we first consider changing the type of oil we use from the regular oil to a synthetic oil. What are your comments on doing this? How much of an increase would there be in mpg? If we did change to a synthetic oil, what type of oil and oil filter would you recommend? What are the steps to follow in changing from regular oil to a synthetic oil? Are there other ways to improve the mpg on this vehicle other than just changing the type of oil we use?   deerhunter3 Replies to this message: tidester (Feb 23, 2008 12:58 am) deerhunter3 (Feb 23, 2008 7:09 pm) tidester (Feb 23, 2008 10:25 pm)
#474 of 533 Re: Recommendation for Synthetic Oil [deerhunter3] by tidester HOST Feb 23, 2008 (12:58 am)
Replying to: deerhunter3 (Feb 22, 2008 7:47 pm) Changing from one kind of oil to another may affect your gas mileage somewhat but the greatest improvements in gas mileage usually come from adjustments to driving habits.   tidester, host SUVs and Smart Shopper Replies to this message: deerhunter3 (Feb 23, 2008 7:09 pm) tidester (Feb 23, 2008 10:25 pm)
#475 of 533 Re: Recommendation for Synthetic Oil [tidester] by deerhunter3 Feb 23, 2008 (7:09 pm)
Replying to: tidester (Feb 23, 2008 12:58 am) I was considering changing the oil to Mobil 10W30 synthetic during the next oil change. But one of the guys in the shop recommended that I use a synthetic blend during the change process (3 oil changes) then use the full synthetic oil after that throughout the length of time that I own the vehicle. I thought it was not a good idea to use a synthetic blend, that I should switch to a full synthetic oil right away. What are your thoughts.   Thanks deerhunter3 Replies to this message: tidester (Feb 23, 2008 10:25 pm)
#476 of 533 Re: Recommendation for Synthetic Oil [deerhunter3] by tidester HOST Feb 23, 2008 (10:25 pm)
Replying to: deerhunter3 (Feb 23, 2008 7:09 pm) I am by no means an expert on oil, synthetics or otherwise, so I can't advise. With a little luck, someone who knows will drop by and provide some guidance! Anyone?   tidester, host SUVs and Smart Shopper
#478 of 533 Flashing Service Engine Soon Light by cavalier14 Feb 25, 2008 (9:38 am)
My mom recently bought a 2004 TrailBlazer LT with the 4.2L Inline-6 that has a hair less than 35,000 miles on it. The second day she had it, the "Service Engine Soon" light flashed about 3 times and then shut off. It does this periodically and absolutely randomly. Other than that, it seems to run fine. I hooked my scanner up to it to see if there were any pending codes that wouldn't have set off the light and I came up empty handed. Please let me know if you know what's going on. Any tips would be greatly appreciated. Replies to this message: leabug (Feb 28, 2008 6:19 am) biglink (Mar 24, 2008 7:33 am)
#479 of 533 Re: Flashing Service Engine Soon Light [cavalier14] by leabug Feb 28, 2008 (6:19 am)
Replying to: cavalier14 (Feb 25, 2008 9:38 am) I own a 2005 Chevy Trailblazer LS and I have had this happen to me only a couple of times. However, I previously owned a Jeep Grand Cherokee Laredo and this also happened a few times. This may sound weird but it has something to do with your gas cap or door. Next time it happens, try this. First, turn the engine off. Then open the door to the gas, take gas cap off and then replace. Make sure it is correctly in place then shut the door back. Then just restart your engine. The "check engine" light should go off. Very simple and it has always worked for me. I also noticed that it usually only occurs just after filling the tank completely. My problem right now is the cluster. I was hoping there was a recall on it since I have heard that many have complained about this same problem. My speedometer works on occasion but the fuel gauge stays on empty at all times and the oil pressure gauge stays at 120. Its really irritating and my warranty has also expired.
#480 of 533 Re: Flashing Service Engine Soon Light [cavalier14] by biglink Mar 24, 2008 (7:33 am)
Replying to: cavalier14 (Feb 25, 2008 9:38 am) It could be that the gas tank has a crack in it Chevy will replace it for free or the catalytic converter could be going bad they will also replace that for free. It could be as simple as the gas cap not on tight enough however the two things that I mentioned before went bad on mine.
#481 of 533 2006 Trailblazer LS Gas Gauge Problem & Engine Whining by paulanthonydfw Mar 27, 2008 (12:04 pm)
My 2006 Trailblazer LS started acting funny about a month ago. The gas gauge will go to the correct reading and then after about 1 minute it will go to empty and the amber light will come on. I guess I should take it in to the local chevy dealer, has anyone had this similar problem. Also there is a whining noise coming from the engine when you give it gas. I'm no longer under warranty so any help would be appreciated. This has been a great vehicle and my first Chevy. Thanks! Replies to this message: trailblazer1 (Mar 27, 2008 1:49 pm) lanitiag (May 07, 2008 4:45 am) juliep83 (May 08, 2008 8:45 pm) madisonsmommy (Jun 12, 2008 5:38 am) paulanthonydfw (Jun 12, 2008 5:12 pm)
#482 of 533 Re: 2006 Trailblazer LS Gas Gauge Problem & Engine Whining [paulanthonydfw] by trailblazer1 Mar 27, 2008 (1:49 pm)
Replying to: paulanthonydfw (Mar 27, 2008 12:04 pm) Love my 02 Trailblazer as well. Currently have over 200,000 miles and runs as good know as when I first bought it. Beautiful Black Onyx color. Never had any major problems. Just change all the fluids when recommended.   Anyway, according to past posts the whining noise comes from a worn idle pulley. My 02 has the same noise but not a big issue. Have not experienced the gas gauge problem. Maybe somewhen else could steer you to the right fix.   Hope this helps.

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