Question about 1991 GMC K1500
U may have a dirty valve body passage, have u changed the trans fluid and filter in the last 60,000 miles,. if no do and use the new GM Dexron VI trans fluid, it has greatly improved shift characteristic's and has the best detergent property out there to keep the trans clean. I have personnel experience with this fluid in my 96, I was amazed.
Posted on Dec 24, 2008
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Posted on Jan 02, 2017
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