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Chevy Silverado: Problems & Solutions - READ ONLY

1497 messages,  Last post on Oct 17, 2006 at 8:34 PM

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#1418 of 1497 Re: I Could Use Some Friendly Advice [clubten] by fatboyntroy Jul 30, 2006 (2:03 pm)
Replying to: clubten (Jul 15, 2006 9:42 am) Same problem here, guys. Just bought an 01 silverado w/ 5.3L, 66,000 miles. Runs very smooth, but at stops, the tach goes to around 300 w/ac on, and headlights dim at night. Idle's so low it wants to stall, then surges & nearly floods when i give it gas. Seems like a bad alternator would show up at startup, and i would think a vacuum leak would cause rough idle--none here. I agree w/clubten at this point: possibly MAF or EGR. I assume there's no simple idle speed adjustment, & wonder if a performance chip would solve this problem? Also, could a bad ground be responsible? Sorry, no answers, just more questions.Please let me know if you hear anything. P.S. Www.carcomplaints.com lists a technical service bulletin (TSB #040604040) to address idle instability, low or rough idle w/electronic throttle control, but this is all i can find, no details.
#1419 of 1497 '03 Silverado by balich Jul 31, 2006 (6:32 am)
My stereo now has no sound .. it appears fine (display, etc) but no sound .. it's been like this for 3 days.   It happened before but the sound came back the next day.   Same thing happens to my friends '03 truck as well.   What is the fix ?   I am out of warranty .. is this a defect - if so will it be covered by GM ?   Has this happened to you and how did you resolve ?   Thanks!
#1420 of 1497 Re: 1998 Z-71 engine missfire [pstone] by fireman133 Aug 01, 2006 (7:18 am)
Replying to: pstone (Jul 24, 2006 6:26 pm) hey i got the same model of truck i just bought and it has a rough idle but when you are driving down the road it seems to smooth out. i had it checked out and i have a bad injector on #5 cyclinder. this might be something to check out. Replies to this message: pstone (Aug 02, 2006 3:37 am)
#1421 of 1497 99 Silverado overheating 5.3L by 1longwand Aug 01, 2006 (7:06 pm)
Truck has 130k miles. I have had overheating problems for several weeks now. Temps have been in the upper 90's and doesn't help. Truck temp has gotten as high as 260 but hasn't boiled over once. The problem gets worse on the interstate or at idle. At slow speeds it doesn't overheat or if outside temps are below 85. I started by draining the antifreeze( the fluid that came out was as clean as new), I flushed it anyway to make sure core wasn't stopped up, didn't work, then replaced fan clutch w/ extreme duty rating, didn't work, replaced thermostat w/190, then water pump, then coolant temp sensor for good measure. Nothing has worked. I'm not loosing any fluid, my spark plugs look good,( not lean or discolored)truck runs good. My hoses are good and lower one doesn't collapse under pressure. Please help. Replies to this message: gmctruck (Aug 02, 2006 4:09 am) 1longwand (Aug 02, 2006 1:45 pm)
#1422 of 1497 trans confusion by casper812 Aug 01, 2006 (7:17 pm)
ok any of you ever hear of this? I,m going down the road about 80 mph in my 95 silverado and it dropped out of overdrive so I pulled over checked out didnt find anything obvious so I pulled out and discovered I also didnt have 1st gear. so c coming home sometimes I had 1st gear and sometimes overdrive. so I,m confused is this a servo problem or something worse? any help would appreciated
#1423 of 1497 Re: 1998 Z-71 engine missfire [fireman133] by pstone Aug 02, 2006 (3:37 am)
Replying to: fireman133 (Aug 01, 2006 7:18 am) I don't know why but I had never thought of that. that does make sense. thanks I'll look into it.
#1424 of 1497 Re: 99 Silverado overheating 5.3L [1longwand] by gmctruck Aug 02, 2006 (4:09 am)
Replying to: 1longwand (Aug 01, 2006 7:06 pm) "I flushed it anyway to make sure core wasn't stopped up"   Does that mean you flushed out the heater core itself? Just draining the fluid will not flush out debris build up inside the heater core or cooling system. One thing you have not checked is your temp gauge. If you research various GM truck forums, you will see that there have been many problems reported of malfunctioning gauges and such. If all else fails, install a separate temporary temp gauge to make sure it matches the instrument cluster gauge readings. Unless you still have a blockage in the engine block or elsewhere in the cooling system, it should not be overheating. Don't trust the temp gauge readings unless you have tested the gauge itself. Replies to this message: 1longwand (Aug 02, 2006 1:45 pm)
#1425 of 1497 Re: 99 Silverado overheating 5.3L [gmctruck] by 1longwand Aug 02, 2006 (1:45 pm)
Replying to: gmctruck (Aug 02, 2006 4:09 am) yes, after draining coolant, I then flushed the system and rechecked fluid for debris but was still as clean as new. Thank you for resonding with your suggestion on the temp gauge, I will try that next.
#1426 of 1497 Pass lock problems by matt3869 Aug 02, 2006 (3:58 pm)
Hopefully somebody can help me out. I have read a few of the messages pertaining to the pass lock system. I have a '99 5.3L Z71. A year ago, the passlock acted up. I had a remote starter installed for a few years and having moved to Florida, I figured it was the problem as it has to bypass the passlock to work, I had it removed and the problem was gone, at least for a year. It acted up several times again and I took it to my local dealer. They said I need to replace the passlock which cost me $260. Fine and dandy until 3 months later it did it again. I took it back and figured the passlock again. This time they said they checked the passlock and it was not the problem, although after having it for 27 hours and only doing 2 hours of diagnosis to it, they said they could not find a problem anywhere, which makes me believe they screwed me good the first time. Is there another problem it could be? It seems weird to me that they supposedly fixed it once, but then with the same exact problems, they couldn't find it. I read the message about using the right resistors to bypass the system, which sounds good, but I'd also like to know what other things could be causing this problem. It doesn't have a pattern. I get in and the truck turns over, then shuts down. The security light comes on intermittently while driving. I wait about 5-10 minutes and it fires back up. Any ideas would be very much appreciated.
#1427 of 1497 Re: 2003 Silverado EVAP Emission Control System Vent Vlv/Sol Malf [anikeman] by bigchevybenny Aug 04, 2006 (2:24 am)
Replying to: anikeman (Jun 09, 2005 5:47 am) WELL WHIETT, YOU COULD INVEST IN A PERFORMANCE TUNER (SUPERCHIPS) WHICH IS BY THE WAY THE TUNER I PURCHASED. THE TUNER ALLOWS REPROGRAMMING YOUR VEHICLES COMPUTER AND CUSTOM EDITING OPTS. TO ONE OF THE THREE PROGRAMMING OPTIONS YOU CHOOSE IN ADDITION IT READS AND RESETS OR CLEARS YOUR DTCs Replies to this message: matt3869 (Aug 05, 2006 5:44 am)

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