93 Chevy Bounder

[Bounder302]

Hi, getting a service engine soon light. Can anybody tell me where the obd connection is?

[Jim_HiTek]

OBD wasn't required on truck chassis until '06 or so. Likely what you'd have is a European style connector under the dash directly in front of the drivers left foot. Sometimes stuffed up inside a bundle of wires.

But I'm speaking of diesel chassis. Don't know if Chev did it the same. BTW, if they have anything readable by a standard OBD reader, I'd be surprised.

In any case, here's some info that may be of some use: J1587 Port

[1972VWbus]

Look to the left of the steering column under dash edge. You can use a paperclip in pins A-B and read the codes. It will flash the 'SES' light and you count the flashes (short and/or long). Write them down.

How's the RV running?

https://www.youtube.com/watch?v=i_Y7TiVqsBA

[Bounder302]

Originally Posted by 1972VWbus

Look to the left of the steering column under dash edge. You can use a paperclip in pins A-B and read the codes. It will flash the 'SES' light and you count the flashes (short and/or long). Write them down.

How's the RV running?

Long crank, hard start, once running seems great. Does not skip or stutter.

[1972VWbus]

Originally Posted by Bounder302

Long crank, hard start, once running seems great. Does not skip or stutter.

1. Check and verify fuel pressure (9-13psi)

2. If fuel pressure check good pull code/s.


I'd be willing to bet it is the 'Coolant temp sensor' in the front of the intake manifold.