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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 10, 2006
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Open Help Requests for GM
Help Request Answers
2003 Buick Century Custom 3.1L Poor Idle Quality VIN: 2G4WS52J63
Hey techs I have an odd one. I just want to thank all of you in advance for your time. Ok I have a buick with an idle speed of 2300 at all times. vehicle had two codes P0113 Intake air temp sensor high voltage P0111 intake air temp sensor intermittant high vol...
1992 Cadillac DeVille 4.9L No Start, Cuts out, Stall VIN: 1G6CD53BXN
hello caddy world. the gem was brought to us by another shop. the orignal complaint was that the car would run rough and stall interminently. it would always start back up but sometimes die right back out. also, sometimes the fan would kick on and the idle mot... Trouble codes: 52 (ecm reset)
1999 Chevrolet K3500 5.7L Surge, Cuts out VIN: 1GBJK34RXX
This vehicle came in with a trunning problem . It has duel tanks with a fuel delivery problem. when taking a volumn test on it it will stall . The customer says also that when put under load when applying breaks it surges. have checked cam retard and it is run...
1999 Chevrolet Tahoe LS 5.7L fuel leak VIN: 1GNEK13RXX
Strange problem-thank you up front for any ideas on this 2000 tahoe. When full of fuel and vehicle idles for about 20-30 minutes(warming up under vehicle considerably)fuel begins to leak rapidly from canister vent valve under hood. Liquid fuel should never be ...
1999 Chevrolet Silverado 1500 4.8L lubrication system VIN: 1GCEC14V1X
Hey all you GM Techs, Customer was driving to work, approx 10 miles and the oil pressure went to zero and the lifters started to tick so he shut it off. Towed to the dealer and they said that they found coolant in the oil and the head gaskets were bad. They th...
2001 Chevrolet Monte Carlo SS 3.8L ABS and Traction control VIN: 2G1WX15K01
Good day Techs This Monte has the ABS light on, traction off light stays on, in dash message center shows "service traction system", overhead console instant mpg now reads "E" and used to work. This all happened after customer drove 60 miles in wet, slushy sno...
2002 Chevrolet Astro 4.3L Fuel gauge VIN: 1GCDM19X52
The fuel gauge is boucing back and forth when the van is in "park." As soon as I put it in "drive," the problem goes away. No fuel is sloshing. The scan tool gave me a code P0463. The only info I could find was to check the "IPC." I don't want to tear into the...
2003 Chevrolet Malibu 3.1L Steering Rack VIN: 1G1ZS52F34
Thanks for all help! This car has a clunking/thumping noise on turning that seems to be coming from the rack/column area.We have disconnected the the outer tie rods and the noise is still there when turning the steering wheel.This car has electric assist steer...
1992 GMC Jimmy SLE 4.3L Surge, Stall VIN: 1GKCS13W6N
vehicle came in with complaint of surging and stalling at stops. have inspected for vacuum leaks, stuck egr, timing out of spec., dirty throttle blade, etc. tried new map sensor and iac. tried idle relearn each time. still surges at idle until eventual stall. ...
1995 GMC C1500 Sierra SL 5.7L Hesitation, Surge VIN: 1GTEC19K6S
thanks in advance,veh came in with hesitation,found bad egr valve(leaking at base of pintle),replaced egr, still same prob lem hesitates & runs poor right off idle.(runs great at idle and at cruise).With ac on idle surges after coming to stop in gear(intermite...
1999 GMC K1500 Suburban SLE 5.7L Poor Idle Quality, MIL Lamp on VIN: 3GKFK16R3X
Thanks in advance for any help. This Suburban keeps coming back to us with a cyl #5 misfire. It has plenty of power and does not miss when on acceleration or normal driving but when in gear it surges or loopes pretty bad. We have tuned it up twice (with delco ...
1998 Oldsmobile Bravada 4.3L MIL Lamp on VIN: 1GHDT13W3W
customer complains of ses light on. pulled codes for o2s heater circuit. replaced o2s twice. also o2 heater circuit fuse blows.have tested all wiring and found no problems at time of testing. grounds are good. assume short, but unable to locate. any ideas or s... Trouble codes: P0135, P0147, P0155, P1153 (insuffcient switching of o2s)
1988 Pontiac Bonneville LE 3.8L No Start VIN: 1G2HX5437J
Hello, I am having a problem with a no start. Customer states: was running fine the night before, went to start next morning and just cranks over. Has good spark and good fuel pressure. every once in a while it will act like it is out of time and ocassionally ...
1995 Pontiac Trans Sport 3.1L Poor Idle Quality, Stall, Misfire VIN: 1GMDU06D7S
This vehicle has a rough idle and will stall at times. It pulls great down the road. A previous shop replaced tune up items listed above. I found the coil wire to coil connection loose and replaced the wire end. Removed the EGR valve and made sure it wasn't le...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet Camaro RS 5.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1G1FP23EXM
I would like to thank all who replied to my help request. This one ended in a rather dramatic climax. I had tested the ECM per the diagnostic procedures layed out in my repair manual(MOTOR). I followed the procedure for what I had which was constant CEL w/ no ...
1993 Chevrolet Camaro Indianapolis 500 Pace Car 5.7L No Start VIN: 2G1FP22POP
i originally had a code 42. i fixed that with ic module. i then got a code 41 est shorted or open. i have checked all power and gnds. and r&r the ecm 3 times 1st one aftermarket unit by a-1 cardone. it would not give codes or data but would run car up to 3000 ... Trouble codes: DTC, 41 (est circuit short or open).
1998 Chevrolet Metro LSi 1.3L No Start VIN: 2C1MR5224W
sorry I didnt close yestyday as things got busy as usual.I stayed late wed. night and removed new pan.I replaced the oil pan gasket with rtv.car starts right up.fel pro told my parts surplier their gasket would not cause no start but guess what.Lesson learned,...
1998 Chevrolet Venture 3.4L push rods VIN: 1GNDX03E7W
Thanks to all who replied. The information was grately appreciated. Mike
1998 Chevrolet Express 3500 5.7L oil pressure VIN: 1GCHG35R3W
Thank you technicians for the assistance in my oil pressure problem,12 techs assisted me in this and was infact correct for the most part.All sugested oil pump,screen blockage,cam bearings.I found a combination of all listed .NEEDS a Motor.I sold a engine and ...
1999 Chevrolet Blazer 4.3L Monitors VIN: 1GNDT13W3X
Thanks for all the help. Replaced thermostat, monitors still wouldnt run. Finally gave up on it and did a waiver on it. Between myself and a friend at another garage ther were 900 miles driven on this truck under many different variations of drive cycle tests....
2000 Chevrolet Cavalier 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JC5243Y
thanks to everyone for their input on this . it was the timing chain,dosnt make sense to me because the cam and crank senser readings looked ok, but that was part of my problem. (over analyzed the problem ) thanks again Trouble codes: 300 (random misfire).
2000 Chevrolet Silverado 1500 4.3L No Start, Engine Flooding VIN: 1GCEC14W1Y
First I would like to thank everyone for their replies. Most of your replies suggested it was either a problem with the injectors, poppet valves, or the fuel pressure regulator. All of these were very good suggestions. They definitely pointed me in the right d... Trouble codes: 0300 (random cylinder misfire).
2003 Chevrolet Silverado 2500 HD 6.6L trans shift faults an d lack of power VIN: 1GCHK23133
well after a lengthy battle, of removing the wire harness for inspection, checking all related pin connections, opening and inspecting all computer boards for corrosion. no distinct problem could be located, but after reassembly and two full weeks of commercia...
2003 Chevrolet Express 1500 5.3L MIL Lamp on VIN: 1GCFG15T93
This vehicle has not been back since I posted my request for help. Thanks to all who replied and if and when the vehicle comes back I will be sure to post the fix. Thanks again!!. Trouble codes: P0171 (Fuel trim lean bank one), P0174 (Fuel trim lean bank two).
2004 Chevrolet Impala LS 3.8L speedometer\tach VIN: 2G1WH55K64
thanks folks!this one is fixed-a remanufactured ipc repaired the speedometer & tachometer problem.1st ipc was defective & they exchanged the unit & all is well.did not need to be programmed. thanks for all the replies especially alfred from florida who saved m...
1999 GMC K3500 Sierra SL 5.7L Poor Fuel Economy VIN: 1GDJK34R4X
Well after only three replies I gave it the old college try. I did go to flatratter.com but did not feel like dishing out the money. It seems like a good site but I didnt have the time to look around for my credit card and wait for it to process(im a flat rate...
1990 Oldsmobile Silhouette 3.1L Cuts out VIN: 1GHCU06D1L
finally this car is gone as most of people have said,tcc solenoid... opened valve body,replaced solenoid & gasket test drove,does not cut off thanks to all who replied.
1988 Pontiac Firebird 5.0L Cuts out, MIL Lamp on VIN: 1G2FS21E8J
Well, the customer has yet to return the vehicle. Although he did call and ask what it would run to replace the engine. Our best thought with this thing is that there may have been a different cam put into this and it may have affected the the self check for t... Trouble codes: 43 (ecm low voltage at esc / knock sens 5 seconds).
1991 Pontiac Grand Am LE 2.5L Cuts out, Stall, Misfire VIN: 1GZNE14U3M
replaced module and cps 2 times,replaced computor, replace wires and coils and plugs,unplugged alt no change ,scaned and checked fuel presure , checked all power and grounds and bypassed ignition switch and grounds no luck only thing i can think of is bad prim...
1993 Pontiac Bonneville SE 3.8L Master Cyl. VIN: 1G2HX53LXP
Thanks to Chris from Virginia ! I isolated the flex lines and found a solid brake pedal. I released them one at a time and found the problem was the L/R wheel cylinder. Now it did have a broken bleeder but I was able to bleed and get air out of the line. I did...
1999 Pontiac Firebird 3.8L No Start VIN: 2G2FS22K4X
Thanks fellows, the ignition module was grounded out on the one side causing this issue, I guess that saying is true you learn something everyday! This website is great! Once again thanks for the info and good day.
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