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01-29-2017, 06:25 AM
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#1 |
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Registered User
Join Date: Jan 2008
Location: Soutwestern New Hampshire
Posts: 145
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reduced engine power
I have a 2003 3500 4X4 regular cab, 6.0 engine with 4L80 auto. just had to have the transmission changed as the owner before me plowed in high range, drive and it played hell on the internals but I didn't know this at the time of purchase. Now the check engine light comes on and the message "Reduced Engine Power", and the truck will shut off. now the transmission shop says they have never encounter this before. they went back and checked all the connections to transmission and found a faulty ground from the firewall to the transmission, they replaced it but we still are having this problem. I think myself it is a grounding problem, can anyone here tell me where the grounds are located that might have been disturbed when changing the trans out?
thanks
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2020 GMC Acadia Denali (Maroon) 2003 GMC 3500 4X4 Dually Dump (Red) 2007 KZ 41KG Toy Hauler (White with stripes) 2015 Harley FLHTCUTG Trike ( Maroon) 1995 Harley FLT (2 tone Red) 1992 Chevy S-10 4x4 Blazer (Dark Red) |
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01-29-2017, 02:34 PM
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#2 |
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Registered User
Join Date: Oct 2009
Location: .
Posts: 2,187
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Re: reduced engine power
Usually that light will come on when there is a dbw problem. There will be codes stored in the pcm. What are they?
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01-29-2017, 03:09 PM
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#3 |
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Registered User
Join Date: Jan 2008
Location: Soutwestern New Hampshire
Posts: 145
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Re: reduced engine power
check engine light did come on the same time that the message came up, don't know codes as I called the trans shop and they came and picked it up
__________________
2020 GMC Acadia Denali (Maroon) 2003 GMC 3500 4X4 Dually Dump (Red) 2007 KZ 41KG Toy Hauler (White with stripes) 2015 Harley FLHTCUTG Trike ( Maroon) 1995 Harley FLT (2 tone Red) 1992 Chevy S-10 4x4 Blazer (Dark Red) |
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01-30-2017, 09:36 PM
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#4 |
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Registered User
Join Date: Jan 2008
Location: Soutwestern New Hampshire
Posts: 145
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Re: reduced engine power
got truck back today and it was as I suspected there was a broken ground wire on the back of the engine in the harness, all fixed and it runs great again and shift like a new truck.
thanks for all the input
__________________
2020 GMC Acadia Denali (Maroon) 2003 GMC 3500 4X4 Dually Dump (Red) 2007 KZ 41KG Toy Hauler (White with stripes) 2015 Harley FLHTCUTG Trike ( Maroon) 1995 Harley FLT (2 tone Red) 1992 Chevy S-10 4x4 Blazer (Dark Red) |
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