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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
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2008 3500 chevy reduced power code mass air flow sensor

Customer Question

2008 3500 chevy reduced power code mass air flow sensor replaced it = still a code
JA: Does the engine stall right after starting? And what about hesitation or jerking during acceleration?
Customer: no power
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: no it has been in and out of a dealership fpr about two months=went back to the dealer this morning
JA: Anything else you want the mechanic to know before I connect you?
Customer: the harness was replaced two weeks ago==l am beginning to loose faith in the dealership
Submitted: 2 months ago.
Category: Chevy
Expert:  GM Bob replied 2 months ago.

Hello my name is Bob

Do you know the code that it is setting?

What harness did they replace?

Customer: replied 2 months ago.
pulled invoices-service 4wd message is on---replaced hubs in*****-- installed###-##-####sl n actuator installed 24261367 sl n module replaced transfercase module and encoder motor -- truck overheated to 220 then cooled down they said water pump was bad replaced it / cel is on an reduced en power message caused by tested an fd that plugs have excessive resistance po678-po676-po674--glow plug 4-6 & 8 circuit==replaced all glow plugs- short in injector harness - installed 12629647-n-harness == reduced eng power was still coming back all the time they replaced sensor for air flow I put a new k filter on like I said its back in the shop second day now.
Customer: replied 2 months ago.
Tuesday morning =sensor has been replaced = emc will be updated = k filter to be replaced with a factory filter this suppose to put e
Customer: replied 2 months ago.
any comments
Customer: replied 2 months ago.
what is the response to the ?.
Customer: replied 2 months ago.
I have not gotten an answer to the cause of the engine light. If their was a response I do not see it.