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99 Yukon 5.7 liter hesitates 138,000
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Putterpatm
New User
Nov 17, 2017, 11:23 AM
Post #1 of 7
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99 Yukon 5.7 liter hesitates 138,000
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Yukon runs great. New plugs,wires,fuel filter with clean throttle body,good vacuum and pvc valve. Full fluid levels. Hesitates on highway. Worse under load and uphill. Otherwise does fine. Locked up rear end replaced last year. RPM stable when hesitating.
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Discretesignals
Ultimate Carjunky
/ Moderator

Nov 17, 2017, 3:03 PM
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Re: 99 Yukon 5.7 liter hesitates 138,000
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Check engine light on? If so, what code(s) is stored? Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Nov 17, 2017, 3:03 PM)
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Putterpatm
New User
Nov 17, 2017, 4:24 PM
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Re: 99 Yukon 5.7 liter hesitates 138,000
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Sorry I forgot to say the check engine light is not on and there are no error codes. Thank you.
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Hammer Time
Ultimate Carjunky
/ Moderator

Nov 17, 2017, 4:27 PM
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Re: 99 Yukon 5.7 liter hesitates 138,000
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Have you actually had it scanned or are you assuming that because the light didn't come on? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Putterpatm
New User
Nov 18, 2017, 11:38 AM
Post #5 of 7
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Re: 99 Yukon 5.7 liter hesitates 138,000
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The shop did not scan it since check engine light was not on.
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Hammer Time
Ultimate Carjunky
/ Moderator

Nov 18, 2017, 11:41 AM
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Re: 99 Yukon 5.7 liter hesitates 138,000
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That does not mean there are no codes stored. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Putterpatm
New User
Nov 18, 2017, 11:59 AM
Post #7 of 7
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Re: 99 Yukon 5.7 liter hesitates 138,000
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Okay. Thank you. I will have it scanned Monday.
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