After replacing alternator, engine cranks but won't catch.

Asked by Nov 30, 2012 at 05:36 PM about the 2003 Chevrolet TrailBlazer

Question type: Maintenance & Repair

Alternator went out & my husband replaced it.  Now when you try to start it, it sounds like it would if it were out of gas.  It won't start.  What could have gone wrong?

1 Answer

31,855

Have you tried jumping it? The engine requires approximately 9.5- 10 volts to crank depending on the battery and engine size. The computer requires an additional 1- 1.5 volts. A battery can have enough voltage to crank but have nothing left for the computer to run. The bad alternator could have left the battery in that charge where it seems ok but isn't.

Your Answer

Add photo

Related Questions

Search Chevrolet TrailBlazer Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 740
#2 bigdogracer
bigdogracer
Reputation 580
#3 dandyoun
dandyoun
Reputation 550
View All

Related Models For Sale

Used Chevrolet Tahoe
870 Great Deals out of 27,816 listings starting at $1,700
Used Jeep Grand Cherokee
910 Great Deals out of 66,042 listings starting at $300
Used GMC Envoy
43 Great Deals out of 2,214 listings starting at $2,500
Used Chevrolet TrailBlazer EXT
7 Great Deals out of 1,210 listings starting at $2,490
Used Chevrolet Silverado 1500
2,586 Great Deals out of 151,361 listings starting at $1,500
Used Ford Explorer
1,114 Great Deals out of 71,430 listings starting at $799
Used Chevrolet Impala
899 Great Deals out of 35,026 listings starting at $1,700
Used Chevrolet Blazer
1,282 listings starting at $2,000
Used Chevrolet Camaro
438 Great Deals out of 40,559 listings starting at $3,500
Used Dodge Durango
370 Great Deals out of 23,074 listings starting at $1,300
Used Ford F-150
3,008 Great Deals out of 207,511 listings starting at $1,200

Used Cars For Sale

2009 Chevrolet TrailBlazer For Sale
3 Great Deals out of 129 listings starting at $2,700
2008 Chevrolet TrailBlazer For Sale
34 Great Deals out of 719 listings starting at $1,500
2007 Chevrolet TrailBlazer For Sale
24 Great Deals out of 868 listings starting at $1,600
2006 Chevrolet TrailBlazer For Sale
24 Great Deals out of 857 listings starting at $1,700
2005 Chevrolet TrailBlazer For Sale
7 Great Deals out of 749 listings starting at $2,900