I had to change the fuel injection spider on my 97 Tahoe and had the same symptoms you have. You probably have a strong fuel smell from the tail pipe.
I also had to do this a couple of months ago on my daughters 01 Blazer. I bought a used one from injectorpros1999 on ebay. It was guaranteed for life. Kinda hard to beat.
PM me if you want more details. I have been thru this twice in as many years. Im starting to get good at it
