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2003 suburban. just installed tranny and now engine in fail…

Customer Question
2003 suburban. just installed...

2003 suburban. just installed tranny and now engine in fail safe mode

Mechanic's Assistant: Are you fixing your Suburban yourself? What have you tried so far?

Yes we installed a brand new tranny and engine in fail safe. grounds seem ok

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Rechecked all conections and they also seem ok.

Submitted: 8 months ago.Category: Chevy
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Answered in 5 minutes by:
11/20/2017
Chevy Mechanic: Gary, Chevy Technician replied 8 months ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 18,018
Experience: 15 years GM master tech
Verified

Welcome! My name is ***** ***** I will do my best to assist you with this problem.Ask me about added features such as phone contact anytime if you wish !

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Chevy Mechanic: Gary, Chevy Technician replied 8 months ago

how is the engine is fail safe mode ?

what is that ?

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Customer reply replied 8 months ago
there is a message in instrument pannel that says it is fail safe mode and i have no throttle response. tranny is new.
Chevy Mechanic: Gary, Chevy Technician replied 8 months ago

disconnect both battery cables for 5 minutes then touch the 2 battery cables together for 1 minute then reconnect both to the battery will it still do this ?

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Customer reply replied 8 months ago
still in reduced engine power after doing that
Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago
Cesar Jimenez
Category: Chevy
Satisfied Customers: 179
Experience: shop foreman at carmona repair
Verified

hi im cesar jimenez and im here to help you today. im reviewing your queston and will get back to you asap

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Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago

have you checked all your ground wires??

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Customer reply replied 8 months ago
ground wires look good
Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago

no grounds that lead to transmision bellhoussing

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Customer reply replied 8 months ago
one ground from body to bell housing
Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago

any codes present?

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Customer reply replied 8 months ago
check engine light is on and i will pull codes tonight. i was told that the reduced power message would turn it on.starts and runs ok but no throttle.and tranny will engage.
Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago

let me know what codes you pull and triple check all your grounds and wiggle them

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Customer reply replied 8 months ago
i will contact you later with codes. going to recheck grounds again.
Customer reply replied 8 months ago
all i get is a vses code with mac scanner
Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago

what number?

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Customer reply replied 8 months ago
p1516 p0463 p0552 p1518 p1626 u1026 u1041 u1064
Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago

ok i will review that

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Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago

can you read live data with that scan tool

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Customer reply replied 8 months ago
no
Chevy Mechanic: Cesar Jimenez,
 replied 8 months ago
That’s as far as I can go. Try a second opinion and have happy holidays
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Chevy Mechanic: Ivan Alvarez,
 replied 8 months ago
Ivan Alvarez
Category: Chevy
Satisfied Customers: 189
Experience: lead technician at Performance Tire and Automotive
Verified

Hello did you still need help?

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