I installed the upgraded injectors (AC-Delco) as part of a LIM gasket replacement. I put about 80 miles on it since then but I can't say I noticed much of a difference yet. In what way have you noticed an improvement?

Christine

 

Performance will be slight. Mileage should get better

 

Awesome, thanks for the info! Putting this on the list

 

I guess it depends on how bad off your original injectors were. Mine were apparently terrible. I had low power, hard starts, bad mileage.
All of that was cured after the upgrade.

 

Yes, my upgrade can be considered more of a preventative maintenance one with a slight hope for improved mileage. It was easy to spend the money on it once I decided to keep my Blazer for at least 4-5 years more. I came to this conclusion after getting shocked by the prices for even 10 y.o, 100,000 to 150,000 mile replacement used SUVs in the same weight and power range.

Also with it already open to do the LIM gaskets, there was little extra labor. :-)