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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 26, 2006
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal 3.8L launch from stop VIN: 2G4WB12L3S
Hey all you GM trans guys out there, I need a little help on my 95 Regal GS. It just developed a shudder on launch at about 1/2 to 3/4 throttle. Engine and trans operate normally other than the shudder. I keep the fluid changed regularly due to driving style a...
1995 Buick Roadmaster 5.7L No Start VIN: 1G4BR82P8S
this vehicle was towed in with a no start condition. tested fuel pressure, spark and injector pulse. all tested ok. checked system for diagnostic trouble codes, none present. pulled spark plugs and found all plugs were fuel soaked. vehicle will sometimes seem ...
2000 Buick Century Custom 3.1L theft system VIN: 2G4WS52J4Y
Help. Have 2000 Buick Century Custom with no start.Have tested by manual and have replaced parts listed above due to codes 2958 and 2957.Still no start and what is strange is codes will set with key out of cylinder as current and after installing key come up a...
1999 Cadillac DeVille 4.6L abs VIN: 1G6KD54Y2X
Thanks for checking this one out! Our customer came in with a complaint of service light coming on. We checked system and found code c1226 stored (rf excessive wheel speed variation). We use a snap-on scanner and for some reason on the data, the wheel speed se...
2003 Cadillac CTS 3.2L Stall VIN: 1G6DM57N33
first off want to say hi to every 1,asking help for another tech, has 03 cadi cts with codes po335,ckp po341,cmp.from what i was told is the car will die while driving down hiway,it will restart.today car would start then die,scoped sensors both look good.any ... Trouble codes: P0335, P0341
1966 Chevrolet corvair 3.0L flywheel
hi members i have a customer that whats me to replace a flywheel on his corvair . what i need to know is a labor time on this , and some insight on the procedure.sorry i don't have the vin or the engine size it's been about 10 yrs since i worked on this one an...
1989 Chevrolet G30 Sportvan 5.7L No Start VIN: 2GCGG35KOK
This van came in with problem of dieing out and sometimes restarting. By the time we checked it out no start at all. No spray coming from injectors. Put fuel in throttle body and it starts but dies out. Fuel pressure is good and you can hear the pump running w...
2000 Chevrolet Impala 3.4L turn signal, warning lights VIN: 2G1WF5535Y
This Impala has an intermitant problem with the turn signals. You turn on either side of the turn signals and you will hear a "buzzing" sound and several of the warnings lights will come on in the cluster. When this is happening, the turn signals will not work...
2000 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1249Y
hello techs, i have a no start,no power to fuel pump issue.pump was recently replaced.with pump harness disconnected from connector at either the body connector or fp module i get battery voltage. with pump harness plugged in i get 0.00 volts.pulled module & u...
2001 Chevrolet Express 1500 4.3L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCFG15WX1
van comes in wont go under load. hesitates- stumbles and bucks. sometimes pops in the intake. check engine light on. po131 po151. replace 02 sensors per customers request. reset pcm. test drive- still does it at first then clears up. returns 1 week later and s... Trouble codes: P0131 (p0151-), P0151 (testing and results)
2001 Chevrolet Impala 3.4L Poor Idle Quality, Misfire VIN: 2G1WF55E71
First of all thanks to anyone who takes the time to read and reply to this post. I am at my wits end on this one. This car has a misfire at idle and at steady cruise only. Ltft is -10 to -15% when this miss ocuurs if you put car into open loop with the tech2 m... Trouble codes: P0300
2001 GMC Yukon Denali 6.0L Armrest VIN: 1GKEK63UX1
I need to replace the air bag module in the passenger seat. In order to do this the armrest and seat back cover need to be removed. I can't see how the armrest comes off, there is a hole in the back, inline with the center pivot, but I don't see/feel any bolt/...
2003 GMC 7500 8.1L Stall VIN: 1GBM7J1E33
this truck stalls with out warning as if a circuit breaker is triping, wev'e been unable to duplicate due they don't want to leave truck. however it is coming back in tonight. driver states that the truck stalls and will not run again until key is turned off t...
2000 Oldsmobile Bravada 4.3L Charging VIN: 1GHDT13W9Y
I have this Bravada that is not charging at all. It has a reman alternator on it that someone else has installed. Not sure of the brand, most likely a cheap one. I have read that alternators are a big problem with these vehicles, especially aftermarket ones. M...
2002 Pontiac Bonneville SE 3.8L Transmission code P1811C VIN: 1G2HX54K42
Hello IATN members. This is a family member's car. A 2002 Pont. Bonneville SE, 3800 V6, 4speed automatic trans. Vehicle sets a P1811C if left in overdrive at above 40 mph (approx.). If you leave car in drive service light stays off and code will not set. I che...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Cadillac Escalade 5.3L not cooling/high low side pressure VIN: 1GYEC63TX3
thanks to all it was a bad compressor replaced and all is good and it was the fuse for the cigar/dlc not workingthanks to all who replied!!
1981 Chevrolet K5 Blazer Custom 5.7L Excessive Emissions VIN: 1G5EK18H0B
To begin with thanks to all who replied.After reading replies took dist out found everything there ok.Removed intake Gasket and found it sucking air oil side replaced that gasket with high perf intake gasket and replaced the bolts for intake (some were too sho...
1988 Chevrolet K2500 Cheyenne 5.7L ign power to coil,etc. VIN: 2GCFK29K0J
found bad pickup after many other hours of scratching head.
1996 Chevrolet Blazer 4.3L heater/ac blower fan VIN: 1GNDT13W2T
The fix, so far, was to replace the high speed fan relay. When the owner came in Friday the high speed fan was cutting out frequently. Since I replaced the relay the fans been ok. I say for now because when the motor was replaced it was fine for a few months, ...
2001 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH55K31
IATN members nail another one...The fix for this one was the IAC. Once we replaced it our problems were gone and the car starts faster [both cold AND warm] than it ever has since the plugged cat problem. My theory is that since this problem started the same ti...
2002 GMC Sierra 1500 SL 4.8L MIL Lamp on VIN: 2GTEK19V12
Vehicle came back with lamp on again (within 450 miles this time), same cat code again. This time freeze frame conditions showed normal code failure - highway speed, part throttle. Watching the O2's on both banks again at the same time, both banks appear norma... Trouble codes: P0420.
1993 Hummer H1 6.2L No Start, Cuts out VIN: 137XE8336P
I had lots of information but the person that reminded me that this is one of the most simple diesels around and really does not need much fuel system bleeding as I have been used to with Mercedes Benz vehicles. The main problem as just about everyone suggeste...
2000 Hummer H1 6.5L Ignition switch VIN: 137ZA8439X
Fixed this lemonzine last week. I used 2003 H2 schematics. The circuit in question comes from the power distribution box to the switch and the then back to the power distribution box. The 40 amp Ign Fuse/Green wire feeds the brake, 4WD, HVAC, Cruise and Ign ...
1995 Oldsmobile 88 Royale 3.8L Poor Idle Quality VIN: 1G3HN52K7S
Sorry guys forgot to close this one. Engine supplier eventually supplied us with another engine, installed and all is well. again sorry for the delay and thanks for all the replies.
1997 Pontiac Firebird Formula 5.7L No Start VIN: 2G2FV22P3V
Well the repair was simple after I sent it to another repair center. They were able to get the car to act up and then they had a tech 2. They found out the car anti thief system was not allowing the injectors to get full voltage. This was why the noid light wo...
1999 Pontiac Grand Prix GTP 3.8L Hesitation, Surge, Stall, Misfire VIN: 1G2WR1212X
thanks for all the help- glen hit it on the head- mass air flow meter- would have sworn it was ign related!!- thanks again to iatn and all the tecs who took the time to help- greg and team
2000 Pontiac Montana 3.4L Steering, suspension VIN: 1GMDX13E6Y
I recieved twenty replies to my post of those thireteen said it was the wheel bearing, two said rust buildup on the sway bar bushings, one said sway bar links, one said he found a broken swaybar end and that he had too look closely to find it. One said the str...
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