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Professional Automotive Repair Technical Discussions for January 22, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2005 Buick LeSabre Custom 3.8L dash lites,gauges VIN: 1G4HP52KX5 Hello all, This Buick came to me via the dealer and customer. Customer states she was driving when all dash lites came on at once, speedo and other gauges went crazy jumping back and forth. The warning chimes and lites were exciting so she drove into a nearby ... |
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| 2007 Buick Lucerne CXL 3.8L steering column VIN: 1G4HD572X7 Greetings Fellow Automotive Repair Engineers and Hands on Practitioners. This is my mothers new car and my parents don't feel that a noise around the lower steering column area is right. The car drives great, tracks straight, and is not showing any kind of tir... |
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| 1964 Chevrolet Corvette 327CID Hesitation VIN: 40837S1090 Hi all, the issue with this classic is the vacuum advance vacuum supply. It's ported vacuum, however the vacuum doesn't drop to zero at idle, but about 2". At this level the vacuum advance stays engaged and the idle is fast. If I lower the idle way down, the v... |
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| 1995 Chevrolet K1500 Cheyenne 4.3L Cuts out, Stall VIN: 1GCEK14Z3S pulling my hair guys in the beggining the timeing was off reset to specs but problem still excists you try to take off and it backfires and stalls starts right up and idle fine if you turn the steering into the locks to make a load and the engine quits doesn't... |
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| 1999 Chevrolet Silverado 1500 5.3L 2-3 and 3-4 Hello everyone. This truck originally came to me with the customer complaining of no 3rd and 4th gears and was noisy. I test drove vehicle and verified it had no 3rd or 4th and was noisy. I checked trans fluid and was full but smelled burnt. I checked codes wh... |
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| 2003 Chevrolet Silverado 2500 6.0L speedo and tach VIN: 1GCHK29U53 this 03 chev truck is driving me to drink. i am a small shop that does musty toyota so my gm skills are rusty. this truck runs great with no other problem. when you start the truck in the morning the speedo and tach work great, as you drive maybe 15 min to 2hr... |
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| 2003 Chevrolet Impala 3.4L bcm VIN: 2GIWF52E83 Thanks for any help in advance.The security light in this car is on and I have no codes in the bcm or anti-theft.The funny thing is when I start the car the security light is off if you open the door while the car is running the door ajar light comes on in mes... |
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| 2005 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13SX5 Hi everyone and thanks up front for any help on this one. Truck came in 2 weeks ago with a PO300 and PO442. Looked in missfire history and found #2 & #5 to have the most but still low number of missfires, about 2000 each. The other 4 cylinders had less than a ... |
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| 1993 GMC K3500 Sierra 5.7L Pressures/shift VIN: 1GDJC34K3P This truck was towed to our shop, no reverse, forward gears ok. When I tested it (in the yard)reverse would engage (tailshaft turned against diff) no movement (discounted brake issues etc). We were busy so sent it to Tran's shop. They found reverse band (expec... |
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| 2003 GMC Sierra 2500 HD SLE 6.6L Power seat VIN: 1GTHK23113 Hello fellow techs, I have this 2003 GMC 2500HD with the drivers side power seat inop. It won't move in any direction, the heated seat doesn't work, and the memory seat function doesn't work either. I checked the main switch for power, and it does have power g... |
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| 2002 Oldsmobile Alero GL 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on, P0300 Hi Guys, Sorry about the VIN,,,I wrote it down and lost it! I'm missing something with this car... Here is the story,, Car ran fine until last night. It developed a misfire and no power all at once (like turning on a switch). I have it in my shop and I looke... Trouble codes: P0300 (Random Misfire) |
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| 1998 Pontiac Grand Prix GTP 3.8L Stall VIN: 1G2WP521XW Hi everyone,I am losing power to fuel pump when pcm switches from high fuel pump speed to normal after start up and engine then stalls,scan tool still shows fuel pump is commanded on but I have no pwer to pump.I have checked fuses,fuel pump relay,fuel pump spe... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2001 Buick Century Custom 3.1L MIL Lamp on VIN: 264WY55J71 thanks for all that took time to read and respond. after 22 responces saying to use an oe convertor, we were convinced! i guess since the price of metals used in convertors has gone up, the manufacturers are skimping and not making these up to par! we installe... |
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| 1992 Cadillac Seville 4.9L Water pump VIN: 1G6KY53B9N Thanks alot all your guys, I took your advise called GM Rep.I told him about GM w/p ( Part# 252-720), he told me that clean cooling system real good and replace with Part # 251-720 instead of 252-720. I hope this will taking care of. Thanks evryone. |
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| 2002 Cadillac DeVille 4.6L battery VIN: 1G6KD54Y42 Since there are not may fixes on these vehicles in the database, and it seems to be a common problem, let's get right down to it. The onstar unit, located behind the rear seat back, on the passenger's side, is a common source of intermittent current draw in th... |
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| 1994 Chevrolet K2500 Cheyenne 5.7L Excessive Emissions VIN: 1GCGK29K8R I want to thank all who promptly replied to this request. We are still in the waiting to give this vehicle our final stamp of approval. It had a dead #4 cylinder and was sent to another shop at the customers request to repair that problem which was an exhaus... |
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| 1995 Chevrolet Caprice Classic 5.7L Poor Idle Quality, Stall VIN: 1G1BL82P9S Thanx for all the replys & help. The customer actually solved this problem (somedays GOD is good to me). Still a little baffled at the rationale behind this one but it wound up being a passlock / anti-theft issue. The customer had to take the car to work with ... |
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| 1996 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC5241T Customer forgot to tell us he tried to twist the three black wires form the ignition cylinder together to try to get it to start, and when he did this there was a spark. We replaced the instrument cluster and finally the computer relearned the new cylinder. Un... Trouble codes: 1629 (passlock code incorrect or shorted). |
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| 2000 Chevrolet Silverado 1500 4.8L engine VIN: 1GCEC19V1Y i bought a 03 5.3l and iam installing it now,the intake and the right exhaust manifold has to be changed because of the egr and the ecm has to be reprogramed. |
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| 2000 Chevrolet Impala 3.8L Oil Pressure VIN: 22G1WH55K3 Hey...Thanks to everyone that replied, it ended up being the check valve behind the oil filter adaptor, I removed the adaptor and the valve was stuck in the front cover housing, picked it out and cleaned it up..works like a charm with no engine damage, oil pre... |
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| 2001 Chevrolet Silverado 2500 6.0L 2-3 shift VIN: 1GCHK29U21 Hi, most replys were targeted toward map/maf, etc all of which never showed the slightest waiver,one tech submitted a link to check for ecm updates, but that link itself didn't work,I thought I found it in the form of a very weak battery, but a new battery bro... |
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| 2002 Chevrolet Trailblazer LT 4.2L Mechanical VIN: 1GNET16S82 THANKS TO ALL WHO REPLIED ON THIS TRAILBLAZER. THE COMMON CONSENSUS FROM MOST EVERYONE WAS PULL THE ENGINE AND REPLACE THE OIL PUMP/TIMING COVER ASSY. AND THE PICKUP TUBE, BOTH WITH THE UPDATED PIECES PER GM'S TSB. TO THE CUSTOMERS DELIGHT, HE CONTACTED THE GM... |
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| 2003 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on, Lean Condition VIN: 1GNFK16Z63 Thanks to all the techs that replied. The problem was a out of range MAF. After we turn the vehicle to the customer to drive to set codes, To our surprise we were expecting a lean condition code but a PO101 code came in. We replaced MAF and everything seems to... Trouble codes: P0171 (Always Lean Condition Bank 1), P0174 (Always Lean Condition Bak 2). |
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| 1992 Geo Tracker 1.6L No Start, Stall VIN: 2CNBJ18U0N all the replies were good, unfortunately vehicle still not starting on its own. after scouring the internet i'm going to have the ecm rebuilt. a company out of minnesota will do it for 70 dollars and warranty it for 2 years. thx for the help. floyd. |
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| 1999 Geo prism 1.8L MIL Lamp on VIN: 1Y1SK528XX Thanks to those of you have replied to my 1999 GEO Prism issue,however the owner is unable to spare the vehicle at this time, so when we do the repair I will then be in touch. Trouble codes: P0441. |
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| 2000 GMC Jimmy SLE 4.3L tranfer case WELL THIS ONE IS FIXED, THANKS TO ALL WHO REPLIED.AFTER RETESTING CIRCUITS P A B &C AT THE ENCODER I FOUND THAT PIN P WOULD FIRST TEST AT 5V LIKE THE OTHER 4 BUT IF I TAPPED THE TCCM, IT WOULD DROP OUT TO 0 VOLTS. NEW TCCM FIXED. BY THE WAY, CORROSION WAS NOT ... |
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| 2002 GMC Envoy SLE 4.2L No Start, MIL Lamp on VIN: 1GKDT113SX Thanks to all that helped. It turns out there was no ground at the low reference side of the map or tps. Confirmed good wiring. The pcm controls this ground. Replaced PCM & Programmed. Trouble codes: P1220 (tp sensor 1 or 2), P1514 (air flow correlation). |
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| 2000 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NV52E3Y Thanks, to all those who replied. I feel really stupid about this one. I've been a mechanic for a long time and you would of thought that this was my first day. After i sent you guys the help request i decided to check the oil level and found the crank case fu... |
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| 2003 Pontiac Vibe 1.8L Battery VIN: 5Y2SL628X3 We could never find a battery drain on the vehicle. So we installed a Delco Prof. battery and the vehicle has worked good for a week we are going to keep it for 2 more weeks to make sure. Thank you for all of your help. |
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