I994 GMC PICKUP 5.7 ENGINE

Asked by May 06, 2015 at 10:32 AM about the 1994 GMC Sierra 1500

Question type: Maintenance & Repair

THE ENGINE WILL START AND RUN UNTILL THE ALTINATOR STARTS CHARGING THEN IT DIES. IF I UNHOOK THE SMALL WIRE FROM THE ALTINATOR IT WILL RUN GOOD.I HAVE REPLACED THE COMPUTER, THE ALTINATOR AND ALL SENCERS I HAVE FOUND.

2 Answers

33,415

Put a volt meter on the alternator and see what it's putting out. Never heard of an alternator killing an engine unless that battery is dead due to the alternator not charging. Next put a volt meter on the battery itself with the engine off. You may find that your battery is bad. Check and clean all connections also. Post back with findings.

1 out of 1 people think this is helpful.

It is a new battery. I found a ground wire between the engine and fire wall that was loose and fixed it. then it ran good for a while then died again. I removed the small wire from the altinator and drove it home ok. It just won't keep running with the altinator hooked up. not for very long. I will get a volt meter tomorrow and check it. Thanks For your help.

Your Answer

Add photo

Related Questions

  • show me a 1995 GMC suburban 5.7 engine so I can see the ERG valve 1 answer

    1995 GMC Sierra 1500

    -

    Maintenance & Repair

  • 1994 gmc sierra 5.7 won't start 1 answer

    I have a 94 gmc sierra 5.7 that won't start. Getting fuel turns over. Hasn't jumped time I changed cap and rotor, plugs, wires, coil, control mod in distributor still won't fire! What am I missing?

    1994 GMC Sierra 1500 K1500 SLE 4WD Standard Cab Stepside SB

    -

    Maintenance & Repair

  • 1992 GMC 1/2 ton starter problem. 8 answers

    1992 Sierra, 5.7 engine, 5 speed manual transmission. Intermittent starter problem. Seems to be related to heat. Nothing, not even "clicking". 1 hour later all good. Solenoid or Starter?

    GMC Sierra 1500

    -

    Maintenance & Repair

  • 1994 gmc 5.7 stalls out at 50mph 1 answer

    the engine runs great while sitting, driving it stalls out at any thing above 50mph

    GMC Sierra 1500

    -

    Maintenance & Repair

  • Motor swap 6 answers

    I have 98 5.7 gmc, will 97-99 fit

    GMC

    -

    Maintenance & Repair

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,500
#2 John Saffrahn
John Saffrahn
Reputation 3,130
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,740
View All

Related Models For Sale

Used Ford F-150
3,377 Great Deals out of 203,971 listings starting at $1,273
Used Dodge Ram 1500
546 Great Deals out of 12,938 listings starting at $1,795
Used Toyota Tacoma
778 Great Deals out of 33,341 listings starting at $1,900
Used GMC Yukon
516 Great Deals out of 17,745 listings starting at $1,777
Used Chevrolet Tahoe
1,064 Great Deals out of 32,231 listings starting at $1,495
Used Chevrolet Camaro
660 Great Deals out of 39,301 listings starting at $2,995

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
5 Great Deals out of 27,528 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
73 Great Deals out of 7,425 listings starting at $19,400
2015 GMC Sierra 1500 For Sale
194 Great Deals out of 4,680 listings starting at $15,999
2014 GMC Sierra 1500 For Sale
185 Great Deals out of 4,456 listings starting at $14,971
2013 GMC Sierra 1500 For Sale
131 Great Deals out of 2,593 listings starting at $10,995