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Chevy Blazer GMC Jimmy Maintenance and Repair

3449 messages,  Last post on Nov 07, 2009 at 8:55 AM

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What is this discussion about? Chevrolet Blazer, GMC Jimmy, SUV

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#3372 of 3449 Re: SES light on P0171 and P0174 [auto9999] by skiextreme2 May 20, 2009 (4:40 pm)
Replying to: auto9999 (May 20, 2009 2:21 pm) Just a thought, but did you clear the codes after you cleaned the MAF sensor and reinstalled it? Replies to this message: auto9999 (May 20, 2009 6:56 pm)
#3373 of 3449 Re: SES light on P0171 and P0174 [auto9999] by jlflemmons May 20, 2009 (6:22 pm)
Replying to: auto9999 (May 20, 2009 2:21 pm) I'll bet you a nickel you have a vacuum leak. Check the vacuum lines up by the brake booster. There is a large line coming from the intake manifold over to a check valve (small, about the diameter of a nickel). From there, it goes down to the vacuum resevoir in the fender, and down to a hard line. Change all three of the lines. I had these lines on both of my blazers go bad, one at 76K, the other at 84K.   For the PCV hose, a little trick to save you some money. You have a hard plastic line with a straight vacuum line on one end, and a molded right angle hose on the other. For whatever reason, the parts houses around here don't carry that assembly, it is listed as a dealer item. $$$$$   But they do carry the PCV hose assembly for the 5.7L V8 for about $5-6. The hard plastic portion is too long for the 4.3L. Simple, just buy the assembly for the 5.7L, but DON'T TRY TO PULL THE HOSES OFF! Instead, try to push them further onto the hard plastic. This will cause the hose to bulge out and break the glue seal holding them onto the hard plastic. Do the same thing on the original PCV assembly from your Blazer, then just put the new rubber pieces from the 5.7 onto the shorter hard plastic piece from your 4.3L. There you go, a perfectly good PCV vacuum hose assembly for a lot less money than what the dealer would charge!     Replies to this message: auto9999 (May 20, 2009 7:02 pm)
#3374 of 3449 Re: SES light on P0171 and P0174 [skiextreme2] by auto9999 May 20, 2009 (6:56 pm)
Replying to: skiextreme2 (May 20, 2009 4:40 pm) Hi skiextreme2 ,   Thanks for your message. I did not clear the code, and that was what I was wondering about. I presumed that the code would renew itself... Do I have to clear the code to see if my cure worked?
#3375 of 3449 Re: SES light on P0171 and P0174 [jlflemmons] by auto9999 May 20, 2009 (7:02 pm)
Replying to: jlflemmons (May 20, 2009 6:22 pm) Hi jlflemmons,   Thank you again for your kind message. I have read your message carefully and will print it out and do what you suggested.   Again, thank you for your help based on your experience.
#3376 of 3449 help by nlc1139 May 22, 2009 (4:36 pm)
i have a 99 blazer it starts fine but when i step down on the gas pedel a little bit hard it seems like it's fluding but when i let off of it and it ideals ok but i have to barly step on the gas to even go
#3377 of 3449 Re: SES light on P0171 and P0174 [auto9999] by auto9999 May 23, 2009 (8:54 am)
Replying to: auto9999 (May 20, 2009 2:21 pm) Hi everyone,   Here is my update. My Blazer's SES light is turned off after I cleaned the MAF sensor with a sprayed a few days ago. I was planning to have the SES light cleared at Autozone today but when I started the engine the SES was no more lit. I did a lot of homework about the vacuum and PCV hoses and I will keep my research for the next time I need it.   Thank you again for your help. Have a good Memorial Day weekend. Replies to this message: jlflemmons (May 23, 2009 3:29 pm)
#3378 of 3449 Re: SES light on P0171 and P0174 [auto9999] by jlflemmons May 23, 2009 (3:29 pm)
Replying to: auto9999 (May 23, 2009 8:54 am) If you turn your AC on and it will only blow out the heater/floor vents, the vacuum line has collapsed. But now you know what to look for!   Have a great weekend
#3379 of 3449 Re: no power to cab [swoodruff] by kif May 26, 2009 (4:25 pm)
Replying to: swoodruff (Dec 07, 2007 12:15 pm) i have the same problem what did u come up with?
#3380 of 3449 AC Clutch needs replacing by pkirwin Jun 28, 2009 (8:44 am)
My 04 Blazer with the big V-6 has an AC Clutch that is stalling and squeeling. I thought that the problem just might be low freon, but I can find no leaks and the systems is still putting out ice cubes. I need to know what kind of tools and the proceedure for doing this myself. I have worked with AC before, own two classic cars, and have a wife with an extensive first aid kit. While I am there, I plan to replace the water pump and the big rubber band. Pat Replies to this message: Mr_Shiftright (Jun 28, 2009 1:21 pm)
#3381 of 3449 Re: AC Clutch needs replacing [pkirwin] by Mr_Shiftright HOST Jun 28, 2009 (1:21 pm)
Replying to: pkirwin (Jun 28, 2009 8:44 am) COMPRESSOR CLUTCH PLATE AND HUB ASSEMBLY REMOVAL (V7 - DIRECT MOUNT)   TOOLS REQUIRED       * J 33013-B Hub and Drive Plate Remover/Installer     * J 33027-A Clutch Hub Holding Tool     * J 41790 A/C Compressor Holding Fixture   COMPRESSOR CLUTCH PLATE AND HUB ASSEMBLY REMOVAL (With RPO Code HT6/HD6/HU6)   TOOLS REQUIRED       * J 34992 Compressor Holding Fixture     * J 33013-B Hub and Drive Plate Remover/Installer   This is all done off-vehicle of course so you'll need to evacuate and recharge the AC as well.

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