Question about 1999 Chevrolet Blazer
Recurring fuel pump problems of ny own and i have discovered over 1 hundred others online within a hour of searching.
Well In my opinion there where problems with those for some reason or another I don't want to speculate on that one. Always change the wiring harness because there so voltage sensitive, so always change that for one, and I have always installed a GM from the dealership because every time we installed a parts store pump they would 70 percent of the time come back within two years of being installed, But they were lifetime pumps, And nobody does the labor for free so it always ended up costing the customer money, Witch I never thought is right, The one's I have installed from GM never came back. So That is all I can do is give you my Opinion on this. So I sure hope I helps you out. Take care Bear001
Posted on Jun 17, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
engine and the automatic transmission (transmission control is only
for automatics, engine is still computer controlled no matter the
transmission type) in this vehicle are computer controlled and in
most cases when a fault occurs a fault code is stored in the memory
of the computer control module. There are exception to this, such as
the Mass Airflow Meter and fuel pressure problems. What must be done
is to have all the basic testing done such as a scan of the system
for fault codes as well as a check with a live data scanner tool for
engine functions that are not within range of normal, a trained
technician is required to know what is correct and what isn't, then
based on careful diagnostics done from a factory repair manual the
correct part is replaced or the wiring repaired or the computer
replaced (known as the PCM), which is very rarely the problem. Other
basic checks must be done as well such as mechanical problems with
the engine as well as engine state of tune and mileage on the engine.
The transmission can have mechanical issues as well such as no gear
engagement at all or a failed pump or other pressure related
problems. Also engine mechanical problems ca cause many
drive-ability related problem such as rough idle and other symptoms
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