Is a 1999 and 2002 motor in Blazers the same??

Asked by blazser1190 Apr 18, 2020 at 05:44 AM about the 1999 Chevrolet Blazer 4-Door 4WD

Question type: Maintenance & Repair

I had motors changed out and they're not looking
the same nor wired the same.

2 Answers
40,210

TDolby answered 4 years ago

According the Wiki, they are different. Same size though at 4.3L. The 1999 used a Vortex 4300 L35 and the 2002 used a Vortex 4300 LU3. The biggest change in the new engine was the use of the Multi port fuel injection mounted at each intake port. Both engines had the same HP. Is it running correctly? Did the shop use the wiring harness from the older engine?

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