See if it does the same thing when you turn on the A/C. If so the compressor is overloading the electrical circuit when it engages (yes the ac engages in defrost mode) and causing the engine to stall. You may be able to temporarily disconnect the ac compressor until you can have it repaired.
Check the fuse out,could have a loose connection.
SOURCE: service 4 wheel drive comes on at times on 2002 trailblazer
there is something wrong with you 4wd system might be electrial problem get it check be gmc service tech for diag code
SOURCE: chevrolet trailblazer 2006 engine spark plugs
Platinum (or more precisely-AC Delo Iridium) spark plugs. The six spark plugs are directly under each of the six coils on top of the camshaft cover. The air intake needs to be removed, then each of the 10mm bolts for the individual coils. The coils can then be removed and the spark plugs accessed.
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
SOURCE: replaced the spark plugs in a 2003 chevrolet trail...
Hello. the most common reason for this is a dirty throttle body. try cleaning the throttle body out with some throttle body cleaner
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