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3.0 Duramax P1488 CEL code

3.0 Duramax P1488 CEL code

Postby Ogee1 [OP] » Feb 10 2020, 4:20pm

Hello everybody. I have a CEL P1488 on my new truck. Just wondering if anybody else has had this code, and what was the dealerships fix? I appreciate your answers and comments.
Original Poster
Ogee1
Newbie
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Posts: 1
Topics: 1
Joined: Feb 10 2020, 4:09pm
Location: Albuquerque
Year: 2020
Make/Model: GMC Sierra
Variant: SLT
Extra Info: 1500 3.0 Duramax
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Re: 3.0 Duramax P1488 CEL code

Postby swervin36 » Jun 09 2020, 1:20pm

Bought my truck on 5 June and had the check engine light come on yesterday on the way to work. It was the same P1488 code. Called the dealer and they stated that there was a recall to flash the computer. Took about 45 min for the diag and flash. So far so good.
swervin36
Armed Forces
Armed Forces
Combustion on 1 piston [L2]
Combustion on 1 piston [L2]
Posts: 118
Topics: 19
Joined: Sep 17 2010, 2:37pm
Years of membership: 9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership
Location: CO by way of Bama
Year: 2020
Make/Model: GMC Sierra
Variant: SLT
Extra Info: 3.0L Durama Crew Cab
Group Membership:
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Re: 3.0 Duramax P1488 CEL code

Postby swervin36 » Jun 30 2020, 7:38pm

I posted a while back that the firmware upgrade fixed the issue. Well the check engine light came back on when I went to lunch, same code P1488. I have an appointment with the dealer in the morning.
swervin36
Armed Forces
Armed Forces
Combustion on 1 piston [L2]
Combustion on 1 piston [L2]
Posts: 118
Topics: 19
Joined: Sep 17 2010, 2:37pm
Years of membership: 9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership9 years of membership
Location: CO by way of Bama
Year: 2020
Make/Model: GMC Sierra
Variant: SLT
Extra Info: 3.0L Durama Crew Cab
Group Membership:
Servicemen
Registered users

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