1993 Chevy Suburban

Hello, any codes? Do some of the basic tests. Have a helper crank it, while you check for spark at the plugs and injector pulse. If your tbi, you can see the injectors spray gas, that doesn't tell you the pressure is good, you need a fuel pressure gage for that.

To check for codes, use a jumper on the A & B terminals at the datalink connector, turn the key on, no crank. The check engine lite starts flashing, you count the flashes to get the codes.

When the problem occurs, your saying it cranks good but won't start?