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Ok so I have a 1995 GMC Sierra 1500, 2 wheel.

Tiny
KDOSS0827
  • MEMBER
  • 1995 GMC C1500
  • 200,000 MILES
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.
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Sunday, December 30th, 2012 AT 2:35 PM

6 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and check fule pressure first. Then check intake manifold vauum if 15" or belwo suspect clogged converter
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Sunday, December 30th, 2012 AT 2:36 PM
Tiny
KDOSS0827
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  • 4 POSTS
How do I scan for codes?
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Sunday, December 30th, 2012 AT 2:40 PM
Tiny
HMAC300
  • 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
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Sunday, December 30th, 2012 AT 2:46 PM
Tiny
KDOSS0827
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  • 4 POSTS
How do u unclog ur converter?
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Sunday, December 30th, 2012 AT 2:49 PM
Tiny
KDOSS0827
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Or do u jus hafta remove it and get a new one?
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Sunday, December 30th, 2012 AT 2:50 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You dont' you replace it but check intake vacuum first or have apro do this
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Sunday, December 30th, 2012 AT 2:50 PM

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