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Is it electrical or computer or something else?

Tiny
JONOGRAN
  • MEMBER
  • 1999 GMC SIERRA
  • 200,000 MILES
The other day I changed out my factory radio everything went with out a hitch until after I put the big dash back in. I put it in and started the truck and I heard a pop in the inside fuse panel. The radio checked out all is well tried to shut the truck off truck wouldn't turn off. It started smoking from under both headlight. Smoking stopped I wiggled a few wires the truck finally shut off. I let it be for a day went out checked the fuses all are ok. Got in yo drive it home no transmission indicator, rpm gage doesn't work, no gauges work except oil pressure gauge. The service engine soon light is on. It will not **** properly it starts off in 4th gear and drives in 4th no overdrive. While driving the lights seems to flicker BRIGHTER the back yo normal sometimes when u hit a bump. I have no clue what's up all fuses have been checked and rechecked all them are good. PLZ HELP!
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Monday, January 2nd, 2012 AT 4:49 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check the large fuses in teh underhood box or the mega fuse if you have one. It will be in he fuse box as well. But before you replace it recheck your dash install as you probably pinched a main wire and it still is that's w why you are having the problems you are. You will be very lucky you haven't fried the computer as well.
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Monday, January 2nd, 2012 AT 6:41 PM
Tiny
JONOGRAN
  • MEMBER
  • 2 POSTS
I will look and see if that's the problem how do I tell of the computer is fried?
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Monday, January 2nd, 2012 AT 7:25 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You really can't until you see if it will start up. Themega fuse is to protect the system so you may be ok.
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Monday, January 2nd, 2012 AT 8:20 PM

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