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1991 GMC C1500 overheating

Tiny
MANOFBRICK
  • MEMBER
  • 1991 GMC C1500
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 163,153 MILES
My truck was losing fluid from the water pump so I replaced it. It was still overheating so I replaced the thermostat. It is still overheating. Any suggestions where to go from here?
Monday, February 22nd, 2010 AT 8:57 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Let the truck overheat and shut it off. Place your hand on different areas of the radiator. If you feel cold or cool anywhere on the radiator it should be replaced. It should be the same temp all over. If there are also any loose fins ndcorroded, usually at edges, replace it. Replace the radiator cap when you do the radiator too.
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Saturday, February 27th, 2010 AT 3:21 PM
Tiny
SBARKER249
  • MEMBER
  • 3 POSTS
Relace radiator hoses. If they are old, they will collapse when you accelerate, restricting water flow.
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Friday, June 4th, 2010 AT 5:27 PM

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