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Professional Automotive Repair Technical Discussions for December 8, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1987 Buick LeSabre Limited 3.8L No Start VIN: 1G4HR5431H When cranking car sounds like ignition or valve timing off. It backfires out the intake. Please help! |
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| 1989 Buick LeSabre Limited 3.8L MIL Lamp on VIN: 1G4HR54C1K hi guys, i'm getting a hard code 41 cam sensor. i've followed flow chart in mitchell and replaced module ( it was melted)light still on, i have used a dvom to measure voltage(don't have a lab scope). I have 10 volts at cam sensor key on engine off,i have a ste... Trouble codes: 41 (cam sensor) |
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| 1991 Buick LeSabre 3.8L No Start VIN: 1G4HP5365N SERIES ( 1 ) 3800 towed in with no start spins over fine. no crank no fuel psi no injector pulse no spark. crank sensor was replaced at other shop. we have only checked all fuses and power points and also the known ( bad ) ground points under the ignition cont... |
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| 1992 Buick Riviera Luxury 3.8L Hesitation, will not rev VIN: 1G4EZ13L6P Trying to make this quick, car came in after we were closed for a week vacation, customer is a regular and had his son replace plugs, wires and ignition mudule because engine will not rev over 2000 rpm when it gets warm, if you run it hard the cat gets cherry ... |
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| 1995 Buick Riviera 3.8L No Start VIN: 1G4GD22K8S This car was dropped off after sitting for a year. Customer had dash/cluster replaced for the second time at local dealer, after which car would not start and dealer give up. Right now i need to replace starter because it spins but wil not engage. My problem l... |
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| 1994 Cadillac DeVille 4.9L MIL Lamp on VIN: 1G6KD52B3R Vehicle came in this mourning, complaint of jerking and running rough wih check engine light on. Pulled codes 26 codes from memory, cleared. After clearing 16 codes return immediatedly, 80, 79, 78, 77, 105, 102, 114, 112, 110, 128, 126, & 125. I checked batter... |
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| 1997 Cadillac DeVille 4.6L water pump housing assembly VIN: 1G6KD54Y8V Hey Gang. I hate to bother everyone with something that may seem so trivial to some but I'm kinda in a jam and am not sure which way to handle this situation. I've worked on a lot of Cadillac's in the past but not one with the North Star setup before(other t... |
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| 2007 Cadillac CTS 2.8L MIL Lamp on VIN: 1G6DM57T97 good evening i am posting help for a frind at work i have direct contact with vehicle , car has been in 4 times prior for mil on , p0496,evap sytem flow during non purge purge solonoid was replaced 2 times , and fuel preasure senser also , car also had both fu... |
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| 1991 Chevrolet Lumina Euro 3.1L No Start VIN: 2G1WN54T8M HELP!!! This car is kicking my butt! Car came in sputtering and running rough...tested injectors and found three bad...no suprise there! Replaced injectors and sent customer on their merry way. Car came back two days later on the hook with no start condition. ... |
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| 1994 Chevrolet Camaro Z28 5.7L Hesitation, Misfire, Tip in hesitation VIN: 2G1FP22P8R Test drove car cold, & no tip-in,drove on highway to warm up, came to a stop & idles fine go to take off & has tip-in in closed loop. If I un plug TPS tip-in gone, new G.M. TPS, same problem.Fuel pressure o.k.,EGR o.k. when problem occures. |
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| 1996 Chevrolet C1500 Cheyenne 5.0L No Start VIN: 1GCEC19M7T Vehicle was towed in,for no start, we checked spark (ok) and fuel pressure+ 60 psi, checked compression (normal 165-175) our scanner shows no codes, we noticed all sensors seem to have data on scanner, except there is no injection pulse width(it shows "0" when... |
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| 1998 Chevrolet Metro 1.0L MIL Lamp on VIN: 2C1MR2269W Thanks to all who reply. This metro came in w/ck. eng. light on. p0420 cat. code. Cat. has been replaced sometime in the past. Checking o2 readings w/ scantool, I find hos2 voltage @1.25v. unchanging. I'm not sure what diagnostic to use for that. Please wak... Trouble codes: P0420 |
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| 2001 Chevrolet Silverado 2500 HD 6.6L 4wd VIN: 1GCHK24G71 truck arrived stuck in 4wd hi service 4wd lite on in dash.had code b2725 range /mode switch circut and co327 encoder circut using scan tool to select funtion ie turn 2wd high indicater lamp on /off the scan tool reads the lamp is off and the lite on the select... |
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| 2002 Chevrolet Express 2500 LS 5.7L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GAGG25RX2 Customer brought in van, which is part of a fleet for driving seniors and handicapped around town. Said van is using some oil. (since we changed it 2000 miles ago it supposedly has used 4 1/2 qts.) No external leaks. Also he said check engine light flashes whe... Trouble codes: P0300 |
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| 2002 Chevrolet Trailblazer LS 4.2L 1-2 shift and overdrive shifting VIN: 1GNDT13S52 Customer complaint is when cold out and first driving 1-2 shift is extended takes a long time almost has to back off throttle before shifting and also he says overdrive i am not sure if he means 3-4 shift over torque converter lock up. I have felt slight delay... |
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| 2003 Chevrolet Silverado 2500 6.0L NO Start/NO crank VIN: 1GCHK29U13 Hello techs I need a little input on this one ,has me stumped. Original proble was no overdrive at all so had trans overhauled at local trans shop. Everything great ran out just fine fluid level good no leaks also installed vac line to trans for modulator that... |
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| 2003 Chevrolet Cavalier LS 2.2L Misfire, MIL Lamp on VIN: 1G1JF52F33 Please look at repair history below. Everything tested ok so tried changing parts no luck. any other test I am open to suggestions Thanks Jim III Trouble codes: P0304 |
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| 2006 Chevrolet Impala LS 3.9L heater VIN: 2G1WS55146 This police car came into the shop, complaint was no heat at idle. Gave it a little throttle, heat got hot, back to idle, got cold. I replaced the thermostat with OEM part, did not help much. Do these things get air-locked, or something? Have two more complain... |
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| 1995 GMC Safari 4.3L Poor Idle Quality VIN: 1GDDM19W9S G.M. guys. I can't remember enought about the old pre OBD stuff to figure this one, the other problem is repair flowchart says to use some equipment I don't have. Let me explain it best I can, Cold start it goes to 2000rpm then settles down in about 20 sec's, ... Trouble codes: 35 (Idle control malfunction) |
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| 1999 GMC Yukon Denali 5.7L brake system VIN: 1GKEC13R4X problem we're having pedal drops to the floor after truck sits overnight when it gets cold always wind up getting air at the left rear wheel cyl my boss wants me to replace the abs ehcu but i'm not sure this is going to fix the problem ,this is the first time ... |
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| 2003 GMC Sierra 2500 HD 6.0L steering VIN: 1GTHK29U63 I have a 2003 GMC Sierra 4x4 pick-up that has a high frequency vibration/shudder in the chassis/steering when stopping. This is not a brake rotor problem. The frequency is too high and the rotors where replaced (needed front brakes).The vibration did not chang... |
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| 2000 Oldsmobile Intrigue GL 3.5L Controls VIN: 1G3WS52H3Y This intrigue has dual climate control and the passenger side has little to no heat in all modes. Has warm heat but definately not hot, drivers side works well. Scan tool will not comunicate with module.Also when you swith the control to cold on pass. side it ... |
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| 1995 Pontiac Firebird 3.4L Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2G2FS22S7S Hello all! This Pontiac is kicking us...Have code 36 (no 24x crank sensor signal). Renewed sensor, still no signal. (Scanning with Tech2...) Tested wiring to sensor, getting correct reference. Suspected open in wiring to ECM- piggybacked new wires from sensor ... Trouble codes: 36 (No 24X crank position sensor signal to computer) |
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| 2000 Pontiac Grand Prix GT 3.8L theft system VIN: 1G2WP52KXY Thanks up front for any help on this one. 2000 GrandPrix 3.8 engine, this car will crank and start up and then after a second or two the theft system shuts down the fuel injectors. I have narrowed the problem down to only occuring when it sets outside and is c... |
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| 1998 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZG5281W VEHICLE HAS TOTAL OF 8 CODES SAME AS ABOVE PLUS PO507 IDLE CONTROL SYSTEM (RPM TOO HIGH )AND PO1404 EGR-2 POSITION ERROR/EGR CLOSED PERFORMANCE. O2 SENSOR LOOKS GOoD ON THE MODIS,TPS VOLTAGE IS .25V AT IDLE AND 3.3 AT WOT,WHEN I UNPLUG MAP SENSOR I GET .5V AN... Trouble codes: P0105, P0122, P0131, P0401, P0404, P0405 |
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| 2002 Saturn L200 2.2L Radiator VIN: 1G8JU54F92 Hi Guys, Well here is a good one. Customer accidently put a quart of oil in radiator. The radiator is now plugged pretty good. Just wandering if any one saw this before and maybe there is something somebody used to break up the oil. Would like to get the radia... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2004 Cadillac DeVille 4.6L body VIN: 1G6KD54Y74 Hello everyone; I received 3 replies and all were of help. Alex said to check the powertrain mounts and make sure that they were centered properly, and also mentioned that a broken E clip on the 2-3 accumulator pin can cause a similar noise from the trans. Mic... |
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| 1999 Chevrolet S10 LS 4.3L distributor VIN: 1GCCS19X5X thanks guys come to find out when the distributor was removed a peice of the oil pump gear that had shattered in the bottom fell under the oil pump shaft and thats why it wouldnt go down all the way thank you all for your help it is fixed |
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| 1999 Chevrolet S10 4.3L Hesitation, Surge VIN: 1GCCT14W6X I wouldnt exactly call this one fixed but here goes. I did pull the dist. The gear looked like new & the shaft was free wind no binding or resistance. I gave it back to her & she drove it over the weekend with no problems. says it is like it allways has been. ... |
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| 1999 Chevrolet K1500 Suburban 5.7L slips 1 to2, slips 3,and 4 VIN: 3GNFK16R1X I looked at all of your replies. I did a pressure check on the trans, according to the book. The pressure wouldn't increase, so I pulled out the force motor. The small screen was plug with debris, so I put a new one in. Pressure still wouldn't rise. I cou... |
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| 2001 Chevrolet Malibu 3.1L tcc lock up VIN: 1G1ND52J91 THANKS FOR ALL YOUR HELP, A COUPLE OF YOU GUYS HIT THIS ONE RIGHT ON THE HEAD WITH FAULTY SCANNER READING, USED OUR BACK UP SCANNER AND NO PROBLEM, TCC ENGAGED NORMALLY AND NO SPIKE, AGAIN THANKS FOR ALL YOUR HELP |
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| 2001 Chevrolet Blazer LS 4.3L fuel tank VIN: 1GNDT13W91 Well looks like this one is fixed. went thru and rechecked everything found the evap vent solnoid that we had replaced was defective. Your replys that the vent solnoid should of fixed the problem made us recheck it. There was no code set The check engine l... |
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| 2001 GMC Yukon XL 1500 Denali 6.0L air suspension VIN: 1GKFK66U11 Thank you for your help, I measured the vehicles ride height with the air suspension disconnected and it just has a lean to it no matter what, I have rear springs on order for it, |
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| 2001 GMC Yukon XL 1500 SLE 5.3L temp and duct control VIN: 1GKEC16T31 Customer had to take vehicle for use on vacation. GM says there is a control module in the headliner near the windhsield, and I purchased it and will install it when car returns. Thanks for the replies. |
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| 1999 Oldsmobile 88 Royale 3.8L Starting VIN: 1G3HN52K9X Found broken wire to the ignition lock set. Vehicle thought it was being stolen! Thanks for all your help out there! Replaced ignition lock set and rekeyed. |
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| 1986 Pontiac Fiero SE 2.8L Excessive Emissions, Hesitation, Surge, Cuts out VIN: 1G2PF3796G first of all bigs thanks to everyone who replied, you guys filled in the gaps of information i was lacking. It was a about three different problems all a result of the vehicle sitting up too long. injectors had a brown rusty looking powder on top. The external... |
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| 2001 Pontiac Montana 3.4L pass sliding door VIN: 1GMDX13E81 I really appreciate the feedback...I was forwarded a supplement letter to this particular recall that stated that many technicians had called GM Tech Assistance saying that these actuators would not mount without an additional bracket. This letter listed a ne... |
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