Hello All I Have A 98 Suburban 1500 2wd Engine Code R. I Have Replaced My Fuel Pump And it Has Gone Bad Several Times.I need To Know How I Can Determine My Fuel Moduel Code. It Has Asked Either For GFN OR GFM.

Thanks In Advance

 

Don't know what those codes indicate but if you're consistently having pumps go bad...make sure the electrical connections to the pump are clean and solid.
This is a fairly common issue.

 

Thanks Hquick. I Have replaced the harness everytime. I think the main problem is i bought it from Autozone and should have bought an oem brand. Its an airtex pump and i went to their website and it told me to make sure of the module code in order to get the right pump. Go figure. But Anyways thanks for the reply

 

I've heard only bad things about the Airtex pumps.
I bought a pump from one of those ebay stores and had no issues. I only changed it because of the supercharger and wanting to make sure I was getting enough fuel to feed it.
I retro fitted a Walbro pump into mine.
The pump code for the stock OEM pump is MU152 I believe (from memory).