Question about 1999 Chevrolet Blazer

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1999 Chevrolet Blazer 4.3 Auto wemote alarm occasionally will not start - no crank as soon as key is turned to starting position all dash lights radio 4WD selector switch leds are extinguished. Attempting to use the immobiliser manual override procedure is useless. Often leaving for 10 mins than re-trying is successful but sometimes it just won't start unless it is left alone for hours (go to work come home & try again). Any ideas?

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  • 3,197 Answers

Okay... anonymous,

The first... easiest & cheapest assumption is your
IGNITION KEY has become damaged and is
intermittently FAILING...

Simply having another key to try should
tell if that is TRUE/FALSE...

~~ (Caution)

After that the BEST THING TO DO is to make sure
all your battery connections are fresh & clean.

For most of the sane world...
this is not a big deal... but AS for me...
I think static SPARKs and losing battery... is
a HUGE problem ( you should always know all the CONSEQUENCES OF REMOVING POWER in
ADVANCE of so doing ).


You need to consider your BATTERY (both sides).
((Body, frames & engine ground distribution ALSO)).

What I am about to propose can be seriously damaging
if done improperly... (extreme caution)

IF I am understanding you correctly...

dash lights radio 4WD selector
switch leds are extinguished"

The most likely source of your issues is your
PRIMARY (large cable) POWER & GROUND...

can be disproved... when the

Make sure the vehicle is fully secured & NOT
in gear...
(as all your SAFETY switches are being BY-PASSED)...

When the CONDITION recurs...
Apply BATTERY directly to the "S" (start)
terminal of your starter SOLENOID your starter
should engage (good enough).

That single test says your primary battery & ground
systems are OKAY... leaving you to consider the LOGIC
portion of your vehicles starting system & OBD systems.


FREE circuit drawings & TECHNICAL SERVICE
BULLETINS (TSB) for popular USA market vehicles can be viewed at BBB Industries (registration is required as these are real Manufacturer's DOCUMENTS) at:
BBB Industries Premium Alternators Starters Power Steering Products

Hope this helps...

Carnac the Magnificent

Posted on Jul 03, 2017


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SOURCE: 2001 Chevrolet Blazer LS 2-dr, 4 wheel drive, 2 cranks to start

Try replacing the fuel filter first, but it sounds like your loosing your fuel pressure prim when the fuel pump is not working. The fuel pressure should be 62-65 PSI with the engine not running the the ignition key turned on and should drop about 5 psi when the engine is running. If you turn the engine off and check the fuel pressure, it stat steady for morn then 15min. If it drops fast, then you have a leak at your fuel pressure regulator (common) or your return fuel check valve which is located at your fuel sending unit.
Start with the simple and replace the fuel filter, it could just be to dirty to pressurize the fuel system fast enough giving you the hard start.
Thank you for using Fixya and good luck

Posted on Apr 04, 2010

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