GM Automotive Technicians Technical Discussion and Fixes for Jul 3, 2008 - iATN (Members Only)

×

Join Now

Prev	Professional Automotive Repair Technical Discussions for July 3, 2008 International Automotive Technicians' Network (iATN) - Members Only	Next
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM

	Help Request	Answers
	2004 Buick Rendezvous CX 3.4L Windows VIN: 3G5DB03E84 Customer brought vehicle in with the complaint of intermittent window operation, we were able to get windows to fail all the time, pulled codes and found B1477 RAP relay control circuit low and B1507 Low voltage on control circuit, we performed test and pinpoi...	View
	1990 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 2G1WL54T9L Vehicle has a hard time idling and dies when you step on the throttle. Changed MAP. Put a new Crank sensor in a couple of months ago when it was in for a "no start". Vehicle will respond when you shoot carb cleaner in it. We also have a 89 Buick with a 2.8L ... Trouble codes: 33 (MAP Sensor high voltage/ low vac.)	View
	1991 Chevrolet Lumina 3.1L Cuts out, Stall VIN: 2G1WN54TXL This car starts and idles fine. But cuts out or stalls when the gas pedal is pressed. This condition only happens when the car is hot. I replaced the cat. convertor first because I thought it was clogged. Then I replaced the crank sensor to no luck. I hate gue...	View
	1996 Chevrolet S10 LS 4.3L Blinker and P/N fuse VIN: 1GCCT19W3T Customer comes in complains no Turn signals. 15a fusev#16 is blown. Has a dead short with key on doesnt matter if It's in the left or right turn or in the neutral position. with key on the fuse is shorted so I pulled wiring diagram found that if you disconnect...	View
	1998 Chevrolet Malibu 3.1L #1 Misfire VIN: 1G1NE52MOW This vehicle can in running poorly and pulled codes and found multiple misfires on #1 clyinder. Removed plug and found was wet. Tasted a little sweet. Pressurized cooling system, let set for a few minutes and cranked engine over. Moisture blew out. I them put ...	View
	2000 Chevrolet Impala 3.4L instrument cluster VIN: 2G1WF52E2Y customer would like me to remove standard instrument cluster and install optional cluster with tachometer. my question is has anyone ever tried this and will the cluster with the tach just plug right in and work with the exsisting wiring harness? thanks in adv...	View
	2000 Chevrolet Blazer LS 4.3L Cuts out VIN: 1GNDT13W4Y Hello, we have an old customer of ours traveling through town. In the 5 hour drive here this Blazer will quit on the highway as if you turned the ignition switch off - customers explanation. However, once they have pulled over it will fire right back up and go... Trouble codes: P0753 (1-2 Shift Solenoid A circuit fault)	View
	2001 Chevrolet Venture LS 3.4L Cooling Systems VIN: 1GNDX03E01 driving , the temp guage stays below half way .. when you get stuck in trafic or sit at a stop for a few minutes the guage starts to creep up it will go up to just under three quarters then the fans kick on in low speed and it will come down slowly .. on the s...	View
	2001 Chevrolet Silverado 1500 4.3L Hesitation, Surge, Stall VIN: 2GCEC19W01 vehicle runs great at idle and on light accel.on hard accel,acts like running out of fuel,falls flat on its face,backfires through intake,and stalls...have spent about 6 hours on this thing and have no clue..(maybe im just burned out)any help will be great	View
	2002 Chevrolet Trailblazer LS 4.2L Starting VIN: 1GNDT13S22 Hey everyone. Thank you ahead of time for any input and advice! The customer just bought the vehicle. It currently has a single key not a huge set of keys. It has a current B2691 key in ignition ckt fault. I got it to start once. Most of the time it wont even ...	View
	2008 Chevrolet Uplander 3.9L Reverse lights VIN: 1GBDV131X8 I work for a schools system in NE and I need some help. We just received three new Chevy Uplanders and we need to install backup alarms, simple right! Well the problem is if you hook it up the normal way; with the perimeter lighting on these new Chevy's you un...	View
	2004 GMC Yukon SLE 5.3L A/C Controls VIN: 1GKEK13214 Vehicle came in complaint of you can not change where the air blows out. Found a pile of codes. Cleared and the only two to come back were B0229 and B3770. Ran test charts all just to come to a dead end telling me to check diagnostic aids. When you push the mo...	View
	2000 Pontiac Firebird Formula 5.7L Poor Idle Quality, VERY HIGH IDLE VIN: 2G2FV22G9Y This car is a huge headace, it came in with a high idle problemn, high as in around 3000 plus rpm's, but it is intermittent and only idles bad after warm up. When car arrived it had codes for o2 and maf and was getting no maf readings had bad fuse replaced tha...	View
	2002 Pontiac Grand Prix GT 3.8L rotors VIN: 1G2WP52K72 this g/p has a rotational "knock" noise when applying brake light to med, pedal.can feel it in pedal and steering."knock"-"knock"-"knock" til stopped.i can't seem to change the frequency of noise.left inner tie rod has min play at best.looked in archives possi...	View
	2005 Pontiac Montana 3.4L Power sliders VIN: 1GMDV33E45 The driver's side power sliding door will close all the way, and then you will hear a small noise and can see the rear of the door move out as if it is trying to open back up. When this happens, the door will not open automatically from the outside handle like...	View
	2004 Saturn Ion-1 2.2L clutch hydralics VIN: 1G8AF52F04 i've bled this thing every way i could think of, i've had every power bleeder we have on it.but the petal never feels any better. i seem to have good pressure at slave,but looking at the bad design of the clutch hydralic system i cant see how you could ever bl...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1995 Buick LeSabre Custom 3.8L Hesitation, Cuts out, Stall VIN: 1G4HP52L6S Hello all and thank you all again... So after tapping and twisting on the PCM with no luck car ran fine then i walked away and it died again, starts right back up every time. I tested the ignition module again and again all the inputs and outputs are all there...	29
	1993 Cadillac Eldorado Touring 4.6L MIL Lamp on VIN: 1G6EL1297P this car to me from another shop that just wanted me to diag their problem. i told them they had a problem with the cam signal getting to the sensor, and it was a freyed wire. Trouble codes: P0041.	5
	1993 Cadillac Eldorado Touring 4.6L Power Mirror VIN: 1G6EL1292P Well guys. Looks like we have a set of faulty mirrors. We were able to remove the door panels and check both mirrors while operating switch. Customer decided the $1000 plus was too much to pay for new mirrors, so... Many thanks to the techs who took time to po...	5
	1984 Chevrolet Corvette 5.7L digital dash VIN: 1G1AY0784E Thanks, Many of you were right on. I cleaned the connections on the two plugs and the flickering problem was still there. So I sent the dash module off for rebuid. Wayne [...]	5
	1991 Chevrolet C1500 Cheyenne 5.7L charging gauge VIN: 2GTFC29K3M i checked all grounds i installed a extra ground from the firewall to the engine, jumper from the neg battery to case of the alternator , from the pos battery to the pos terminal of the alternator ,,removed cluster installed a extra ground from the batt ton th...	10
	1996 Chevrolet Cavalier 2.2L ipc VIN: 1G1JC1244T Thanks for all the input. After rechecking all grounds for 3.5 volt on a grond at thr ipc connector, after making a few more checks nothing in the dash/raido had good ground. running a jumper to batt neg made all problems go away, took another look at batt and...	4
	1996 Chevrolet S10 2.2L Poor Idle Quality, Hesitation, Stall VIN: 1GCCS144XT Thanks to all that replied. As it turned out the majority was right, it was the timing chain and tensioner assembly. The thing that threw me off was the fact that it would start and run(not very well), but I [...] you stay in this business long enough you will... Trouble codes: P0108.	11
	2002 Chevrolet Impala 3.4L bcm VIN: 2G1WF55E32 Turned out to be a BCM on this unit. I had tried the relearn proceedure a number of times but with a dead BCM there was no response to my attempts. I am going to add the response from Steve [...] here as it tells the proceedure better than I could write. Th...	4
	1990 Geo Prizm 1.6L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1Y1SK7169L Well another problem child is gone!! Thanks to everyone that helped me out on this one. I replaced the ECT sensor just in case, bumped up the timing about 4 degrees and the car did not ping, so I was good there, but what fixed this car was a new O2 sensor!!!... Trouble codes: 12 (No RPM signal for 2 seconds).	12

(Also Available: All, Asian, Chrysler, European, Ford, GM.)