Difference between a 98 "350" and a 99 "350"

Asked by Apr 02, 2016 at 10:57 PM about the 1998 GMC Sierra 1500 C1500 SL Extended Cab SB

Question type: General

I have a 98 GMC serirra and I put a 99 GMC serirra
motor  in to it and for some reason I get a weird
crack or pop when it idles. Is there a difference in
the ecm? Or a difference in motors?

1 Answer

37,965

No there should not be a difference. Did all the plugins connect to all the sensors? A crack and pop indicates timing and or a fuel problem.

Your Answer

Add photo

Related Questions

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,500
#2 John Saffrahn
John Saffrahn
Reputation 3,150
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,760
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,679 Great Deals out of 149,054 listings starting at $1,800
Used Ford F-150
3,393 Great Deals out of 205,480 listings starting at $1,273
Used Dodge Ram 1500
532 Great Deals out of 12,951 listings starting at $1,800
Used Toyota Tacoma
789 Great Deals out of 33,560 listings starting at $2,988
Used GMC Yukon
538 Great Deals out of 17,581 listings starting at $1,777
Used Chevrolet Tahoe
1,091 Great Deals out of 31,949 listings starting at $1,495
Used Ford F-250 Super Duty
476 Great Deals out of 42,814 listings starting at $2,850
Used Chevrolet Camaro
665 Great Deals out of 39,407 listings starting at $3,495
Used GMC Sierra 2500
4 Great Deals out of 184 listings starting at $6,990

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
6 Great Deals out of 27,873 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
75 Great Deals out of 7,132 listings starting at $19,400
2015 GMC Sierra 1500 For Sale
199 Great Deals out of 4,666 listings starting at $15,999
2014 GMC Sierra 1500 For Sale
203 Great Deals out of 4,425 listings starting at $14,971
2013 GMC Sierra 1500 For Sale
146 Great Deals out of 2,576 listings starting at $10,995