1995 Gmc C1500 Sierra 1500 2 Wheel Drive 350 Engine Get On Interstate

1995 GMC C1500
200,000 MILES
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KDOSS0827
  • MEMBER
  • 4 POSTS
Ok so I have a 1995 GMC Sierra 1500, 2 wheel drive, 350 engine. And when I get on the interstate, it won't go over 60. And when I start goin up a hill, I push my foot down, but my speed stil drops down to sometimes in the 30's. Then once I go down hill or on flat surface it goes back 2 60, and then no higher. It jus started doin this like a month ago. Can anyone tell me what I need 2 do 2 fix that.
Dec 30, 2012 at 6:35 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
scan for codes and check fule pressure first. then check intake manifold vauum if 15" or belwo suspect clogged converter
Dec 30, 2012 at 6:36 AM
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KDOSS0827
  • MEMBER
  • 4 POSTS
How do I scan for codes?
Dec 30, 2012 at 6:40 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
auto parts stores do it for free. you'll have to rent gague from there to check pressure but it hink it may be your converter
Dec 30, 2012 at 6:46 AM
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KDOSS0827
  • MEMBER
  • 4 POSTS
How do u unclog ur converter?
Dec 30, 2012 at 6:49 AM
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KDOSS0827
  • MEMBER
  • 4 POSTS
Or do u jus hafta remove it and get a new one?
Dec 30, 2012 at 6:50 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
you dont' you replace it but check intake vacuum first or have apro do this
Dec 30, 2012 at 6:50 AM
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