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Prev Professional Automotive Repair Technical Discussions for July 13, 2011
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Open Help Requests for GM
Help Request Answers
2004 Buick Rendezvous CX 3.4L Cuts out VIN: 3G5DA03E84
hello fellow iatn members, I got one thats puzzling me. The complaint is Dies and runs poor. I can duplicate it and when your start it it will run for sometimes a few minutes and other times a few seconds. It feels like the IAC is just closing and the truck st...
1991 Cadillac DeVille 4.9L Hesitation, no power VIN: 1G6CD13BXM
Hello everyone, i need some help on this caddie its my grandmoms car, car came in with misfire bucking running rough, so i thought easy enough put plugs ,wires, rotor, cap, air. fuel filters and same thing ran like crap . so checked firing order all ok, so the... Trouble codes: E52, E99
1991 Chevrolet Camaro RS 3.1L No Start, Stall VIN: 1G1FP23T0M
Customer stated vehicle starting bucking and had brown smoke coming from the exhaust as he traveled down the road. He parked it at a public lot and walked over to our shop across the street explaing his problem and also stating that his friend had just done a ...
1994 Chevrolet Camaro 3.4L timing cover VIN: 2G1FP22S0R
This Camaro has a water leak between the timing cover and the front of the block. Repair info says to remove the oil pan. I am not too excited about doing that. Has anyone done this procedure or have any tips on this job? Thanks!
1997 Chevrolet K2500 6.5L power steering, power brakes VIN: 1GCGK29F7V
intermitant problem with no power steering or brakes, when towing a trailer (with electric brakes). brake pedal is hard and takes high effort to stop, same with steering, high effort required. if rpm is raised, power brakes and steering return. this usually oc...
1999 Chevrolet C1500 Suburban 5.7L day time runing lights VIN: 1GNEC16R1X
tank you for all you help wen we need it.well we need help this time we have a 99 chevy suburban tha the day runing ligths dont work;the green ligth come on in the dash wen we tun the key,everyting works but thos ligths, we replace the DRL module and dint work...
2000 Chevrolet Corvette 5.7L headlight doors VIN: 1G1YY22G4Y
I turn on the headlights and the go up, but when I turn them off the lights go out but the doors stay up. I can turn them down manualy with the knobs on the top off the motors, turn on the headlights and the go up but not down when I turn them off. There are n...
2002 Chevrolet S10 2.2L No Start VIN: 1GCCS14512
Truck was towed into our shop for a "no start" condition. We found that when cranking the engine we would get one spark and one injector pulse and that's it. We've tried swapping out the cam and crank sensors and replaced the ignition module...still no start. ...
2003 Chevrolet Silverado 2500 HD LT 6.6L Excessive Emissions VIN: 1GCHK23137
Truck started to have light smoke from exhaust at idle starting at 148,000 miles you would'nt have noticed it unless you were really looking for it. Now at 160,000 miles and after a drive on the freeway of about 50 miles you can see a ton of white smoke at idl... Trouble codes: P0404 (Egr performance out of range)
2003 Chevrolet Trailblazer LT 4.2L vent VIN: 1GNET16SX3
this is a manual hvac system with dual climate control. the vents will work for a couple of seconds then the drivers side quits unless I put the select knob one click off of vent then works. temp door still doesn't work and I'm starting to wonder if control he...
2004 Chevrolet Cavalier LS 2.2L Clutch VIN: 1G1JC12FX4
Thanks for taking the time on this one guys. Has me bumfuzzled for sure. This '04 Cavalier came to us with engine blown, installed known good engine from salvage yard, she drove the car for two weeks and the slave went out. I replaced the slave and everything ...
2005 Chevrolet Express 2500 4.8L Hesitation, Misfire VIN: 1GCGG25V45
Vehicle came in with complaint of no power. Intermit maybe once a day. Said could let up on pedal and it would maybe clear up and not do it again for a while. I have just barly got it to do it over a lot of test drives. It feels like a stopped up converter, bu... Trouble codes: P0300 (missfire)
2007 Chevrolet Silverado 2500 HD LT 6.0L No Start, Cuts out, Stall VIN: 1GCHK29K97
Vehicle intermittently cuts off when coming to a stop or turning at slow speed. Vehicle sometimes will not start for 2-3 mins. Occurs sporadically only codes are p0011 and p0016. Verified concern, however starts back up or starts after about 30secs. Fuel press... Trouble codes: P0011, P0016
2001 GMC Sierra 2500 HD SL 6.0L Misfire, MIL Lamp on, flashing mil VIN: 1GCHC29U01
Tuck came in with p0300. Truck just passed Ma insp with OBD2 test the day before. Scan tool on misfie data has equal counts on misfire monitor for cylinders #7 and #8. Disabled injectors with Modis. No noticeable changes on 7 and 8. Moved coils and wires to ot... Trouble codes: P0300 (Random misfire)
2002 GMC Envoy SLE 4.2L no start VIN: 1GKDT13552
Hello this vehicle will not attempt to start cranks normal. there is no spark i replaced crank shaft sensor still no spark. Vehicle came in battery totally dead charged it for a while attempted start no fire . my scan reading for my throttle percentage is 1.50... Trouble codes: 1515 (1516 -), 1516 (testing and results)
2004 GMC Yukon XL 1500 SLE 5.3L Previous repair VIN: 1GKFK66U64
Hi GM techs Have a very difficult customer that insist that we are at fault! The Yukon was in our shop 10K+ miles 9/23/10. All we did was replace the front brake pads and an oil service. What happen is one of his lower control arm bolts came loose and damaged...
1997 Pontiac Grand Am SE 3.1L MIL Lamp on VIN: 1G2NE12M7V
car idling at 3000 rpm and has a non-specific code 1129 Trouble codes: P0505
2001 Pontiac Grand Am SE 2.4L no start VIN: 1G2NF52T21
Found water damage to bcm. Got used one and see got to program it.Can a used one be programmed? Does the pcm get programmed at that time? Will a J2534 pass-thru from snap on do this job?I'm also looking at Drew mongoose cable for this, does that work for this?...
2007 Pontiac Grand Prix GT 3.8L No Start, Surge, Cuts out, Stall VIN: 2G2WP55277
Customer came in on friday, and had trouble getting car going, it took ten minutes to getting running ok to drive to the shop. The problem is it it stall sputters and sometimes wont even start. When it wont start the starter has power and ground but no trigger...
1996 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5274T
This car came in for the first time with a P1404 in October 2010. It had a stuck open EGR valve, which was replaced. The vehicle came back this past Feb. with a P1404 and P0404 (EGR Position Error). After checking the wiring and pigtail, the EGR valve was repl... Trouble codes: P1404 (EGR Closed Performance / Closed Position Error)
2003 Saturn Vue 2.2L BCM Controlled Components VIN: 5GZCZ23D23
A dealer purchased this vehicle from auction, and had a new clutch put in it. When we got it, the gauges fluxuate, the locks lock and unlock constantly, the security light flashes wildly and I get a U2107 code which is a "BCM Not Communicating" code. Just wa...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick Regal LS 3.8L No Start, Stall VIN: 2G4WB55KO1
Yes this one is fixed The customer came back and I replaced the fuel pump relay Didn't hear from him for two weeks though for sure it was fixed.Saturday morning I got the call its stalled and won't start so had a wrecker hall it in sure enough when it got here...
1990 Chevrolet C1500 Silverado 5.7L No Start, Stall VIN: 2GTEC14K5L
Sorry it took me a little while to close this one. Wanted to make sure it wasn't coming back! I took almost everyone's advice and put a distributor in it. It did look pretty rusty in there on the pick up coil part of it. Here's the kicker, next day I get to wo...
2005 Chevrolet Express 2500 4.8L Coolant loss VIN: 1GCGG29V75
Thanks Guys for all the help. I was not able to get the specific van back in, but did get one of the other vans which i had pressure tested before. The water pump was bad on this one. I had looked over all the suggestions pretty closely before and was never ab...
2007 Chevrolet Express 2500 6.0L Power Windows VIN: 1GCGG29U67
2005 GMC W4500 Forward W4S042 5.2L Excessive Emissions, Hesitation, Poor Fuel Economy VIN: J8DC4B1615
I would like to say I have fix this vehicle, but i have not had it back in the shop yet and i need to close this help request. I did unhook the egr valve when it left the shop and it nolonger is blowing out black smoke. It is still lacking power and when it ...
1998 Pontiac Grand Prix SE 3.1L Key VIN: 1G2WJ52M0W
As several suggested, the new Standard part was bad! I got another cyl and it works fine...Thanks for the replies!
2000 Pontiac Montana 3.4L Misfire VIN: 1GMDX03E2Y
Customer decided that it's not worth spending money on the vehicle with all the problems it has. Thanks for all the help anyways. Will update if they change their mind.
2007 Pontiac G6 GT 3.9L Retractable Roof VIN: 1G2ZH36167
Turned out one of the hydraulic lines had a leak so there wasn't enough pressure to engage. Fix was to replace the line and refill the fluid. I did find that if the micro switches are not reading the correct position the Folding Top Control (FTC) will time ou...
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