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Prev Professional Automotive Repair Technical Discussions for May 4, 2011
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Open Help Requests for GM
Help Request Answers
1995 Chevrolet K3500 6.5L No Start, hard starting VIN: 1G8KC34F0S
Customer brought truck to school after computer and injector pump had been replaced for hard starting. Was setting code 36 as well. Truck will roll white smoke, smells like raw fuel and is very hard to start. We checked glow plugs and they were OK, pulled fuel... Trouble codes: 36 (Injector pulse width long)
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1995 Chevrolet Astro LS 4.3L brakes, abs, master cyl, etc.... VIN: 1GBEL19W0S
replaced hydro booster and propotinal valve could it be the master cylinder or abs pump, whats the best way to diagnose both of these to narrow down the problem
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1997 Chevrolet K2500 Suburban 7.4L Poor Idle Quality, rough idle VIN: 3GNGK26J1V
this suburban came to us with rough idle concerns,felt like intermittent plug missfire only at idle.we replace plugs with double plat.no help,ck'd cap and rotor- someone already replaced.ck'd cam synch offset which was 2 deg.-within limits.we noticed high pitc...
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1999 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W3X
The customer came in for a check engine light on. Found code p0410 for air injection pump malfunction. We replaced the air pump 3 times using updated part from GM. This problem happens after it rains. I re routed the air hoses to where GM wants them. Another s... Trouble codes: P0410 (Secondary air injection system malfunction)
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2000 Chevrolet Cavalier 2.4L No Start, Cuts out VIN: 1G1JF52T2Y
We have a cavalier towed in because it died in motion. customer states car was dying at highway speeds for 2 months but always restarted so he kept on going.now it died on a back road.But when we got it it started and ran good on back roads for 15 miles,but on... Trouble codes: P0171
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2000 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1NE52J8Y
ok this vehicle has had the mil intermittantly come on and off very intermittantly, every time its the same codes, p0135, p0443, and p0449. i have ohm checked the heater circuit on the 02, and and tested for ground and power, all within range. same results wit... Trouble codes: P0135, P0443, P0449
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2002 Chevrolet Silverado 1500 LS 5.3L Misfire VIN: 1GCEK14T92
I have this 2002 chevy 1500 with a 5.3 T motor and only misses when driving at about 55 mph and accelerating to pass and dont feel it miss but scanner says it is missing in data (above 4500 rpm). In misfire data it misses on #2 cyl and the SES flashes. We swap... Trouble codes: P0300
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2004 Chevrolet WORKHORSE 8.1L Low power VIN: 5B4MP67GX4
Calculated load low wot 57% idles smooth mass air flow changed with known good no power feels like restricted exhaust but is not or a bad maf. Under wot o2s are not going rich just switching. Have a lifter noise in engine. Injected fuel no change under load ca...
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2009 Chevrolet Express 3500 6.0L Electronic VIN: 1GCHG39K09
This vehicle is consistently setting code PO894. The transmission filter and fluid was serviced at 38000 miles and the fluid looks good. I have found a TSB concerning this code stating to drop pan and check inside of filter for containments and if anything fou...
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2001 Geo PRIZM 1.8L Unknown VIN: 1Y1SK52881
engine has a strange tapping noise that comes and goes.I thought noise was play in timing chain so i replaced the timing chain tensioner and retested. noise is still present. with vehicle idling noise will come and go with no rhyme or reason. the longest it wi...
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1990 GMC C6000 Topkick C6H042 6.0L Poor Idle Quality, Stall VIN: 1GDL7H1PXL
Medium truck guys? idle fluctuates up and down, worse when cold but will do it a little bit when warm. Cant seem to get the truck to idle right and evenly. I can partially cover the hole for the iac motor and can get the idle to lower and become more even. I h...
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2004 GMC Yukon XL 1500 SLT 5.3L driver's power seat VIN: 3GKFK16Z04
Kind of a weird one here, this Yukon had some upholstery repair done (not by us), various seat functions were inoperative afterwards (heater, power seat, etc.), customer returned to upholstery shop, some type of connection was restored, and system was function...
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2004 Pontiac Grand Prix GT1 3.8L Blower Motor VIN: 2G2WP52224
Blower motor not working. Checked processor and plugged in a new one, still nothing. Also no REAR DEFOG or AC led lights when pressing buttons. Checked all fuses pertinent to system-all OK. Thank you in advance for all your help! Ron [...]
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2002 Saturn Vue 3.0L Fuel Gauge VIN: 5GZCZ63B52
Car came in with fuel gauge inop,needle starts to move when key turned on then stops,replaced both rear senders per svc bulletin,still no gauge looking at scan data I have fuel level voltage at 1.60 volts when you shake the car to move the fuel in the tank vol...
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Fixes & Summaries for GM
Fix/Summary Answers
1998 Cadillac DeVille 4.6L Level Ride System VIN: 1G6KD54Y8W
Well after asking my delco rep for some clarification on the ability of the compressor to hold overnight, he brouht me the trouble tree for diagnosing level ride faults and said the guys he talked to said they just put standard air shocks on and manually fille...
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1999 Chevrolet Tahoe 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEK13R2X
Thank you guys for your help - most all of you were right about the vacuum leak. I checked crankcase vacuum and sure enough that was it. The intake gaskets never even came to mind. I pulled the lower intake and I could see where the gasket had shifted aroun... Trouble codes: P0300 (Random misfire detected).
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2005 Chevrolet Equinox LS 3.4L Abs VIN: 2CND173F85
thanks for all the replies, even though the L.F. sensor tested good, i took just about everyones advice and replaced the hub, cleared the code and sent the customer down the road. i haven't heard back from the customer so everything must be fine. thanks again!...
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1999 Oldsmobile Alero GL 2.4L egine idle miss at rpms over 1000 engine runs good VIN: 1G3NL52T2X
SORRY GUYS BEEN AWAY FROM THE STORE FOR A WHILE TO REC AND MY GUYS FORGOT TO CLOSE THIS REQUEST. SOMETIMES WE GO AROUND THE BLOCK TO FIX A PROBLEM WHEN WE COULD STAND RIGHT HERE AND FIX IT,WE HAD THE EXHAUST CAM ONE TOOTH OUT OF TIME,EXPLAINING THE SLIGHT MIS....
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1997 Pontiac Grand Am SE 3.1L anti-theft VIN: 1G2NW52M4V
Thanks for the help everyone. I wanted to wait a few weeks to make sure the problem was really gone for good. All data lines, volatges etc.. tested good. I ended up replacing the IPC from Advanced Auto Electronics Inc.web:aaellc.com (Thanks Robert). They wer...
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