1990 GMC Truck

1990 GMC TRUCK
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CHEWYPONCE
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  • 1 POST
1990 GMC Truck V8

1990 gmc topkick where the back up light relay is located
May 3, 2010 at 2:14 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
i don't think there is a relay, check for a bad ground/wire/ or fuse. If there was a relay it would be in teh panel with the rest of them. Also check for a bad switch
May 26, 2010 at 8:46 AM
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