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Prev Professional Automotive Repair Technical Discussions for July 29, 2008
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L Cuts out, Stall VIN: 1G4CW52L2R
To all; Thanks in advance for taking a look. I have this Buick that was towed in for an intermittant no start, cranks over fine sometimes will start and stall other times just cranks. When it starts it runs for a few seconds then loses injector pulse. Injector...
1992 Cadillac Seville 4.9L No Start VIN: 1G6KY53B9N
intermitant start/stall-message on dash wait 3 mins looses injector pulse, sometimes will start up after approx 60 secs, starter does crank. tested key/lock and changed due to higher resistance on lock when tested under dash-still has same sysmtons. I feel the... Trouble codes: 58 (passenger efi enable control problem)
1990 Chevrolet K3500 Cheyenne 5.7L No Start VIN: 1GDHR33K4L
please send help for this vehicle. first things i am a ford guy. this vehicle was towed in for a no start. test has no spark and no pulse. test no codes. test power and grounds at dist. all ok. replace pick up coil,module,coil. retest has spark and inj pulse ...
1991 Chevrolet Camaro Z28 5.0L MIL Lamp on VIN: 1G1FP33F8M
please help. camaro came in with only idle no power dies out. another garage diag. was bad module in dist. price to high customer didnt like garage etc.. car comes to me pulled cap found green screw in module and dirty pick up. decided its distributor time. in... Trouble codes: 43 (esc module or circut fault)
1995 Chevrolet K2500 Cheyenne 7.4L No Start VIN: 1GCGK29N6S
this truck act like it is not getting enough fuel. pressure is at 14 psi. if i pinch the return line off i can get the truck to run it bump the pressure up to about 41 psi. i dont think i have the fuel pressure to make it run right. most tbi was 9-13 psi. but ... Trouble codes: 54 (fuel pump circuit)
1998 Chevrolet K1500 Cheyenne 5.7L no communication VIN: 2GCEK19R9W
This is the first time this truck has been in our shop. We are doing a Missouri Emissions Test. The Emissions OBD II tester does see valid voltage at the OBD II port, but is unable to communicate with the PCM. I have 12v on terminal #16 and good ground on #4 &...
2000 Chevrolet Astro 4.3L Hesitation VIN: 1GCDM19W2Y
Hi all, van came in with complaint of no power. Test drive felt like clogged cat since it was bogging down under wide open throttle. Exhaust coming from cat was especially hot and seemed like there wasn't much coming through. I had already noted this cat for r... Trouble codes: P131, P151, P0713
2004 Chevrolet Silverado 1500 4.8L fuel fill problem VIN: 1GCEK14V24
This vehicle came to me with the symptom of very hard to refill fuel tank. Customer states this has become bad over several weeks. Recommended from GM and installed revised canister purge solenoid and revised breather along with new charcoal canister. Customer... Trouble codes: P0306
2005 Chevrolet Aveo LS 1.6L No Start VIN: KL1TD52615
towed in for the second time with in a month with soaking wet plugs. there are no codes. i pulled the plugs and cycled key to energize fuel pump, i don't see any fuel dripping into cyls. after drying everything out, it starts up fine. all for plugs are wet wit...
2005 Chevrolet Malibu 2.2L radio, trunk release button VIN: 1G1ZS52F15
hello fellow techs. i am currently looking at this malibu that has several inop accessories. the radio is completely dead no display. also the trunk release button located on the left side of the driver seat is inop. and finally the digital display of the curr...
2007 Chevrolet Impala LS 3.9L Airbag VIN: 2G1WS55R77
I received this Impala police car from a local body shop that had preformed the body repair and replaced the front crash sensors, air bag module under the seat and replaced the seat belt tensioners in the front. We got the car in and flashed the module and pre...
1995 GMC G2500 Vandura 5.7L Hesitation VIN: 1GDEG25KXS
This vehicle came in overheating and leaking coolant severely at cylinder heads. We removed cylinder heads and they were cracked so we replaced them. After we got everything back together in running condition, we noticed on test-drive that it had a lack of pow...
2003 Oldsmobile Alero GL 3.4L Loses coolant VIN: 1G3NL52EX3
Hi all, this is a rebuilt car and I'm starting to wonder if I have missed anything here. When you switch the car off, it will puke some coolant out, I have replaced the head gaskets, and the rad cap. The radiator temp is consistent all over, and the cooling fa...
1996 Pontiac Firebird 5.7L cooling fans VIN: 2G25FV22P1
Cooling fans do not operate. Neither engine temp or with the a/c on. We can turn the fans on with the MODIS so we assume that the circuit is sound as far as wiring goes. Leaning toward an ECM but customer is, lets say, fragile financially. Will not authorize a...
1999 Pontiac Firebird Formula 5.7L MIL Lamp on VIN: 2G2FV22G0X
PLEASE help.I have wasted to meny days on this problem. Car came in with code po157 low voltage.Checking this problem with alldata(more like NODATA).monitoring voltage,its lowwer than specified.disconnected o2,grounded low voltage wire from computer,voltage is... Trouble codes: P0157
2000 Pontiac Grand Am SE 3.4L Right front VIN: 1G2NF52E6Y
This vehicle is driving me crazy.We have seen this car multiple times and every time they say the noise is gone for a couple of days and then comes back.We originally replaced the struts and strut mounts,also the brake pads and rotors.Replaced the mount on the...
2003 Pontiac Vibe 1.8L no compression VIN: 5Y2SL64823
anyone know if this 1.8 l is an interferance engine??? cutomer ran it out of oil , i think timing chain tensioner runs on oil pressure. have 120 psi #1 25psi#2 25 psi #3 20 psi#4.
2004 Pontiac Grand Prix GT2 3.8L wont run monitor VIN: 2G2WS54254
1999 Saturn SC2 1.9L engine VIN: 1G82H1272X
this car is an auction car . its stalls intermittently and has a slight hesitation when you first accellerate like a bad tps and stalls sometimes when you accelerate lightly or hard . one you get past about 1500 rpm it stays running. the tps is reading right b...
2002 Saturn SL2 1.9L anti theft VIN: 1GBZK52752
Good Morning, This Saturn came in a few weeks ago customer complaining of key hard to turn in Ignition. I replaced the ignition lock cylinder and ignition key and the key turned freely. I started the car twice in the shop and it ran fine no security light. Cus...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L No Start, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G4HP52LOR
Thanx for all the replies. After many hours of wire tracing and testing we fixed the car with a new PCM ( delco) and repaired wiring terminal pins inside the pcm connector. Most likely from all the backprobing in this vehicles life, the pins were stretch... Trouble codes: P0341, P0342.
1991 Chevrolet Corvette 5.7L Poor Fuel Economy VIN: 1G1YY3386M
It's a case of the left hand not knowing what the right hand is doing, 1991 corvettes only have 1 o2 sensor- right off the manifold on the left side so it can only monitor 1 side of the motor. In this case I found two injectors on the right side that were leak...
1994 Chevrolet C2500 Cheyenne 6.5L smokes VIN: 1GCGC29F2R
Thanks everyone for the responses. I posted this request before I had thoroughly tested the vehicle. I found the injection timing off. Got the timing right and no more smoke.
1996 Chevrolet C1500 Suburban 5.7L Hesitation, Misfire VIN: 1GNFK16R6T
Through my diagnosis I am convinced that I am not losing my primary signal at all, either PCM to ICM, or ICM to coil. It came down to the fact that the only 2 things I had not changed in the distributor were the shaft and the housing. I borrowed a whole work... Trouble codes: P0300.
1998 Chevrolet S10 2.2L no odometer VIN: 1GCC51449W
this was resolved at the dealer (cascade chevy of klamath falls oregon) turns out there is a wire from teh clutch switch a brown/white?? it was broken they repaired the wire cluster now works in all key possitions i never noticed any trouble shooting info...
2001 Chevrolet Venture LS 3.4L Cooling Systems VIN: 1GNDX03E01
well only a couple of techs had this figured out , it is normal for this van to climb to three quarters on the temp guage .. with the airconditioning not working the cooling fans do not run on high speed till it reaches three quarters on the temp. guage ... if...
2004 Chevrolet Silverado 3500 6.0L rotors pads calipers VIN: 1GBJC34U44
we had sent truck back out with new calipers , rotors and pads -using wagner fleet premiun pads , we are going to pull wheels after 2,000 miles and recheck --some of the good ideae were to change rear brake hoses , check por/valve and make sure front brakes ar...
2001 Hummer H1 6.5L brake calipers VIN: 137FA90301
Thank you, thank you! We installed 2 1/16" washers between the hydrabooster & the master cylinder as suggested and vehicle's brakes perform well. Another suggestion is to inspect the calipers for binding, we will do that also. Again, Thank you for all the resp...
1999 Oldsmobile Intrigue GL 3.8L alternator VIN: 1G3WX52H3C
thanks for all the help you needed to remove battery and tray thermostat housing and fans thanks again for the help
2001 Pontiac Grand Am SE 2.4L engine vibration VIN: 1G2NF52T21
I grabbed the intake manifold and moved it up and down and the idle would change and it would smooth out , I showed the customer , he declined me doing the work , went home and did it himself and said it still does it , i think he's a idiot and probably screwd...
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