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Professional Automotive Repair Technical Discussions for February 3, 2009 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1993 Buick Roadmaster 5.7L Mechanical VIN: 1GDL055M8S I have a cylinder that has a leakdown of 20%. Not sure if it is rings or valves. Here is my question... (intake manifold is off) When I put smoke into the cylinder through spark plug hole I can see it come through the intake valve slightly, it seeps out of the... |
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| 2004 Buick LeSabre Custom 3.8L Wipers VIN: 1G4HP52K24 Evening all, This vehicle came to us last week with the wipers working intermitantly when the key is on and wiper switch off. He didnt have time to leave it with us so he left. Today hes back and the wipers wont work at all, we found the motor had failed, so w... |
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| 2000 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y2Y this car came in for a check engine light and erratic fuel gauge opertaion. everything seems to be working properly right now. tested the fuel level sensor with gauge system tester seems normal. got a P0125 and P0463, not sure if the codes are related. I looke... Trouble codes: P0125, P0463 |
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| 2000 Cadillac Eldorado ETC 4.6L rack shudder VIN: 1G6ET1292Y hello everyone i have the aboved mentioned veh,it came in with crunch nioise in l/f on turns,(replace l/f strut and bearing plate)noise gone!found rack leaking and p/s line from rack to cooler leaking,replace both from gm dealer!found after repair had bad shud... |
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| 2001 Cadillac Seville SLS 4.6L engine noise VIN: IG6KS54Y61 Customers complaint was bearing type noise when accellerating, found idler, tensioner pullies noisy, replaced both and belt, belt is queit but when rev engine has hum or wheezing noise, not coming from belt area, can not isolate noise except coming from upper ... |
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| 2003 Cadillac CTS 3.2L ?? VIN: 1G6DM57N03 I have this 2003 Cadi CTS that has a "pecking" or "ticking" type noise coming from what seams the be the passengers side of the engine. It sounds to be comming from under that valve cover. We removed the valve cover with hopes of seeing something that didn't l... |
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| 1995 Chevrolet Blazer 4.3L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13W3S Hello gentlemen, this Blazer runs rich all the time. Fuel pressure is 54psi and rises to 60psi when you snap throttle. Oxygen sensors are at 800-950mv constantley and the computer is trying to hold back fuel - injector time is 0.1ms. Air filter is clean, there... Trouble codes: P0300 (Random Missfire detected) |
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| 1995 Chevrolet Corsica 2.2L Poor Idle Quality VIN: 1G1LD5545S hi, we replaced 3 injectors that were leaking, erratic idle then. now idle is much worse. we removed the iac valve and cleaned it, replaced map sensor and improved idle but still idle is off. checked spark plugs clean. checked for vacuum leaks, none found. won... |
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| 2000 Chevrolet Express 3500 5.7L Mechanical VIN: 1GCHG39R1Y I have a commercial customer with 2 G3500 vans. 1998 with a good trans and bad engine. 2000 with good engine and bad trans. I looked up the engine part # and they are the same. Can I take the trans out of the 1998 and install in the 2000? I was told by a trans... |
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| 2000 Chevrolet C3500 7.4L No Start VIN: 1GSG123456 This one has got me!! Came into shop with a intermittent no start. I was able to get it to start and when I got it into the shop I performed basic maintenance including fuel filter. I went to start the truck and it would not start. It will crank but no start.I... |
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| 2001 Chevrolet Impala LS 3.8L fast idle VIN: 2G1WH55K01 this vehicle idles way too fast- 2000 rpm. replaced IAC, checked for vacuum leaks,none found. checked for melted plenum at EGR tube,looks ok. wondering if anyone has run into this problem. my only other idea is replacing the PCM. thanks for the help. the code ... Trouble codes: P1810 |
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| 2002 Chevrolet Impala LS 3.8L Mechanical VIN: 2G1WH55K22 hey guys i have a 02 impala that has a misfire on cyl #2 only at idle. this happened after replacing upper plenum because the engine sucked coolant into it from the egr port melting.ignition system is new [plug wire coil ]fuel pressure is 56 psi and compressio... |
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| 2005 Chevrolet Malibu 2.2L MIL Lamp on VIN: 1G1ZS54F15 high fuel trims at extended idle vehicle came in for service had a check engine light on indicating bank one running lean. sprayed carb cleaner over whole engine area and found no change in fuel trims. long term fuel trims are fine while driving but creep back... Trouble codes: P0171 (system lean bank 1) |
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| 2005 Chevrolet Impala 3.4L Starting VIN: 2G1WF52E25 hi guys i have this 05 impala tow in no start . i check codes no codes i have a tech 2 scann tool also the techline web i could program . i do a lot of programming . this car is make me crazy . no codes and no crank if i jump the starter car starts and shut of... |
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| 2005 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1GCHK23U35 DTC U1007 Replace throttle body assy, TAC module, APP sensor checked all wiring did find purple wire at throttle body broken inside insulation repaired it, still same problem.As for data in the TAC module 0.0 V from APP 1 & APP 2 bypassed APP1 sensor (gas peda... Trouble codes: U0107 (loss of communication with throttle actuator) |
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| 1991 GMC K2500 Sierra 5.7L No Start VIN: 1GTGK24KOM This truck was pulled in off the ski hill. Itbwould not start up there and when we tried it here same thing. pulled it into shop and checked for fuel and spark both there and fuel was just dumping in when we cranked even on a clear flood. Dealer stated that th... |
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| 1993 GMC Jimmy SLE 4.3L Cuts out VIN: 1GDCT18ZXP Truck came in with cutting out under hard acell, and CEL comming on with code 31 over boost / waste gate malfunction. Tested boost control system. This customer has a Cylone also. I compare tested the two trucks. Every thing between the two trucks are the same... Trouble codes: 31 (over boost / waste gate malfunction) |
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| 2001 GMC Jimmy SLE 4.3L electronic 4wheel drive VIN: 1GKDT13W51 hey fellas last year this vehicle was in for an issue with the 4 wheel drive. we had replaced the encoder motor on the transfer case, the electric switch to engauge 4wd and the module. now the vehicle is back with the 4wd inop. checked all fuctions nothing is ... |
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| 1991 Oldsmobile 98 Regency Elite 3.8L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1G3CW53L7M Car has code 41 stored . Found burnt wiring at cam sensor , replaced pig tail and sensor. Still have code 41 , Check cam sensor magnent and found it was broken and missing magnent . Replace cam sensor magnent and retest still have code 41 setting. No signal fr... Trouble codes: 41 (Cam sensor circuit) |
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| 1995 Oldsmobile Aurora 4.0L Trac light off VIN: 1G3GR62C9S The traction control light stays on steady. The light comes on and stays on after 15 seconds of initial start up. The transmission will not shift properly when the trac light is on. The engine appears to run ok but did notice once it had an excessive crank.The... |
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| 2001 Oldsmobile Intrigue GX 3.5L 3rd to overdrive (4th) shift VIN: 1G3WH52H51 Owner reports, and test drive confirms no upshift to 4th gear. Tech 2 scan tool verifies shift is being commanded by PCM but the shift does not occur. 1-2 and 2-3 are normal and within time specs (less than 65ms), 3-4 shift is always 0. My question- and the ... |
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| 2006 Pontiac G6 2.4L electric steering VIN: 1G2ZF55B16 car was in front end accident. came in for alignment. test drive - found left turn easy (pinky turn) and right turn hard (2 handed). car has electric steering. followed previous iatn posting thinking bent steering shaft. no fix. no codes. did notice on scanner... |
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| 2007 Pontiac Torrent 3.4L Starting VIN: 2CKDL63F27 customer complaint of battery going dead. checked for battery drain with lo amp probe. draw is around .065 ma when modules go to sleep after some time the bcm wakes up and you can hear the rear liftgate latch attempting to open every minute or so with an avera... |
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| 1998 Saturn SC1 1.9L fluid airated VIN: 1G8ZF1286W hello all...i worked at the saturn dealer and have never came across this...my cust has concern over the fluid on the trans dipstick being foamy or airated when they check it and im not too sure what to advise on this one, or even where to start...both trans l... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1999 Cadillac Catera 3.0L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: W06VR52R9X Installed vacuum gauge to find engine has low vacuum at 12 - 15 inches and fluctuates rapidly indicating a low cylinder. Timing is correct and compression test shows #4 with no compression. Oil added to cylinder with NO increase in compression, shows bad val... Trouble codes: P0650 (MIL Control Ckt), P0300 (Random Misfire), P0304 (4 Misfire), P0305 (5 Misfire), P0306 (6 Misfire), P0325 (Knock Sensor 1). |
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| 2003 Cadillac Escalade 6.0L reduces to idle VIN: 1GYEK63N73 After several weeks of testing, replaced the throttle sensor. No further issues at this time. Thanks to all that responded, I will post if problem persists. |
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| 2004 Cadillac DeVille 4.6L washer pump Hi and thanks for all the good info. I found a bad connection at the wiper motor connector (red wire,which supplies B+ to pump. Fixed that all is good so far. |
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| 1994 Chevrolet Camaro Z28 5.7L Code 81 2-3 solenoid circuit VIN: 2GIFP22P9R First we put in a new ign switch, this seemed like the best thing to try first. (actually was difficult to install). Still no good, code popped right up -went to limp). Then we went after the wiring. I had tested the wiring from the PCM to trans but since prob... |
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| 1998 Chevrolet Cavalier 2.2L Cooling Systems VIN: 1G1JC524XW well, i appreciate all who responded after much debate here at the shop we pulled the head back off,sent it out to be checked,no problems,after re replacing the t stat replacing the water pump,head twice, a coolant bottle,cap,radiator and hours of time into th... |
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| 2002 Chevrolet Silverado 2500 HD 8.1L cold noise VIN: 1GCHK23G23 We found the problem to be with the trans filter, there was a crack in the filter neck sucking air.We replaced filter and noise is gone. |
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| 2002 Chevrolet Monte Carlo SS 3.8L Headlights VIN: 2G1WX15K62 Hi fellows, I was suspicious of the dimmer switch also but because of the cost was cautious. After running it over 2 hrs. to try and duplicate problem (did not have success), we decided to replace dimmer switch. I disassembled the switch & found the contacts b... |
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| 2004 Chevrolet Impala 3.4L wipers VIN: 2G1WF52E04 Great News! The wiper motor/module assembly was the culprit here. I had thought that it would be a bad multi-function switch as there was voltage coming to the motor but as I have learned the switch will only do what it is told to do. Apparently the park circu... |
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| 2006 Chevrolet Trailblazer LS 4.2L Rearview Mirror VIN: IGNDT13S26 Thanks to everyone who replied. The general censuses on this is that if the vehicle is equipped with auto climate control the OAT sensor is already installed and you just have to install the mirror ($450.00). Then follow the calibration procedure in the owner... |
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| 2001 GMC Yukon Denali 6.0L starter VIN: 1GKEK63U01 WELL MOST OF YOU NAILED IT IT WAS THE PARK NEUTRAL SWITCH REPLACED THE SWITCH AND BOTH CONNECTORS AND NO MORE STARTER HITTING THE FLEX PLATE. THANKS AGAIN TO ALL OF YOUR INPUT. CRAIG |
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| 2003 Oldsmobile Alero GL 3.4L No crank, radio VIN: 1G3NL52E03 This one isn't fixed. I have received some good information on checking it, however the car hasn't acted up since i posted. Customer is driving car until it acts up again. When it comes back, i will post the fix. Thanks. |
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| 1988 Pontiac Fiero Sport 2.8L MIL Lamp on, Hard start VIN: 1G2PE1194J Thanks to all that replied! Well the Fiero Store sent us a GM module in replacement of the so called "high performance" module and it worked like a charm! To be safe I cleaned all the grounds (they looked fine) and took it on a 30 mile road test with no proble... Trouble codes: 42 (est). |
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| 2001 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NF52E61 sorry for the delay in my close.most all of you said thermostat.costmer stated that his"brother in law"had replaced the t-stat recentley-brother in law lied.intake was leaking so i replace gaskets-t-stat and pig tail on temp switch.thanks so much for all who r... Trouble codes: P0125. |
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| 2001 Saturn SC2 1.9L No Start VIN: 1G8ZY12781 RECEIVED 13 REPLIES. SOME STATED TO CHECK FOR STRONG SPARK, GOOD FUEL PRESSURE, MAKE SURE NOT TO USE BOSCH PLUS, BUT 5 OUT OF THE THIRTEEN SAID TO DOUBLE CHECK THE COOLANT TEMP SENSOR. EVEN THOUGH OUR TEMPERATURE READINGS SEEMED BELIEVABLE ON THE SCANNER, WE... Trouble codes: P1599 (engine stall condition detected/history code). |
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