SOURCE: 98 chevy s10 blazer turn signal
Unplug the turn signal relay from the fuse box and start you engine. Does it still make that noise?
If yes... Put the relay back in, that is not the problem.
If No...Then the relay could be bad, replace it!
PLEASE RATE THIS SOLUTION! Thank You Very Much!
SOURCE: 89-98 chevy blazer
It's not worth doing all that conversion, buy the time you spend the time and money to convert the 89 4.3 to work on the 98 blazer, it would be cheaper to install a 98 vortec rebuild. The 89 4.3 have a TBI fuel injection system and the ecm on the 98 will not work and the bad news is that the ecm on the 98 also controls the transmission shift points and the 89 will not, so even if you swap the ecm to have the 89 4.3 engine work. the transmission will not shift. Sorry for the bad news but it would be cheaper to replace the 98 engine with the years of 1996 to 2001. Good luck and hope this helps.
SOURCE: I have a 1998 Chevy
This is a common problem in ALL GM vehicles. Bypassing is possible but not as easy you might think. The system is designed to prevent bypassing. This link has tons of info and the part you need to read most is under PERMENANT FIX http://vatspasslockpasskeysecurityhelp.yolasite.com/
SOURCE: 98 Chevy blazer won't start up but will crank ,,
Try giving it a shot of starting fluid. You don't say if it's actually firing. If it tries or runs for a few seconds off of the starting fluid then try changing the fuel pump relay. It's inside of the glove box on the left hand side behind the little door. If that doesn't work it's most likely the fuel pump.
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