I bought JET Stage 2 Computer Chips 28708S for my 87 Chevy s10 Blazer. People love my s10 blazer (single owner) but it's a hassle to find parts and make changes. Over time I've installed Edelbrock headers, a cat back exhaust and less restrictive intake, but I kept getting SES codes. So, despite the conflicting reviews, I went with the chip. The first chip didn't work and I had to send the 28708S chip back to Jet Performance as there seemed to be a few chips (promos) for 80's S10 type Blazers. I