can anyone explain this
December 21st, 2018, 7:35 PM
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can anyone explain this
Hey guys i have a 07 silverado max 6.0 and anytime the computer sees some sort of problem and sets the check engine light off or stabiltrak light it shifts hard from 1st to 2nd but the second you clear the code it shifts normal! Ive worked in a few repair shops in my day and seen many vehicles in various makes and models with a check engine light on and many stored dtcs and never had them cause the vehicle to shift hard unless of course the problem was related to the transmission.
I have read all over the internet of people with gm trucks around the same year (07 08 09) complaining of hard shifting when the check engine light comes on even if it is something as small as a evap leak or somthing along those lines that should no way affect how the vehicle shifts. So anytime my truck throws a code for anything the truck will shift super hard from 1st to 2nd and as soon as you clear the code it shifts like new. Now obviously i understand that any issue causing you check engine light to come on should be addressed but it shouldn't cause the truck to shift like that for something like a loose gas cap or something small
can anyone explain why this happens on these trucks.........thanks for your time
I have read all over the internet of people with gm trucks around the same year (07 08 09) complaining of hard shifting when the check engine light comes on even if it is something as small as a evap leak or somthing along those lines that should no way affect how the vehicle shifts. So anytime my truck throws a code for anything the truck will shift super hard from 1st to 2nd and as soon as you clear the code it shifts like new. Now obviously i understand that any issue causing you check engine light to come on should be addressed but it shouldn't cause the truck to shift like that for something like a loose gas cap or something small
can anyone explain why this happens on these trucks.........thanks for your time
Last edited by a-ron; December 21st, 2018 at 7:38 PM.
December 21st, 2018, 9:52 PM
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I would suspect it's because it goes into a safe mode and probably shifts at predetermined points. Once it sees everything is normal it shifts normally.
December 23rd, 2018, 9:35 AM
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As of right now it’s not setting any codes but occasionally the service stabilitrak light will come on for a few miles then go off on its own and while it’s on it will shift hard! But I’ve noticed in the past anytime the check engine light would come on it would shift like that! Oven for an o2 code! Makes no sense why gm would do that if in fact that’s how the set it up it shifts really hard feels like it’s gonna cause more damage.