22.5 Refreshed L3B 2.7 Silverado Fuel Issue

B Batt · May 15, 2023

I was being cheap and upgraded my 11 GMC Sierra with 200K Miles with a wrecked 22.5 Refreshed Silverado with the L3B 2.7. Since it was wrecked GM wont warranty it, which I was aware of. It had 800 miles on it and I bought it for 23K Cash. After draining the rest of my savings in headlights, grill, hood, bumper, paint etc I'm into it 28K right now. I thought I was done... Well the parts gods had different things in mind. And I was wondering if anyone had any of these issues yet?

I drove it around 900 miles so far with no issues, but I went to get on it the other day and it was having an issue feeling like it wasn't getting enough fuel. Low an behold "Reduced acceleration. Drive with Care" popped up. Also my fuel light came on and is now reading empty even though I filled it up 20 minutes before.

I feel as it might be the High Pressure Fuel Pump going bad, but would that cause my fuel gauge to go bad and my light to kick on?

Any thoughts?

newdude · May 15, 2023

2 hours ago, B Batt said:

I was being cheap and upgraded my 11 GMC Sierra with 200K Miles with a wrecked 22.5 Refreshed Silverado with the L3B 2.7. Since it was wrecked GM wont warranty it, which I was aware of. It had 800 miles on it and I bought it for 23K Cash. After draining the rest of my savings in headlights, grill, hood, bumper, paint etc I'm into it 28K right now. I thought I was done... Well the parts gods had different things in mind. And I was wondering if anyone had any of these issues yet?

I drove it around 900 miles so far with no issues, but I went to get on it the other day and it was having an issue feeling like it wasn't getting enough fuel. Low an behold "Reduced acceleration. Drive with Care" popped up. Also my fuel light came on and is now reading empty even though I filled it up 20 minutes before.

I feel as it might be the High Pressure Fuel Pump going bad, but would that cause my fuel gauge to go bad and my light to kick on?

Any thoughts?

SCAN. FOR. CODES. Link to a great OBD code reader - BlueDriver

Being you bought a wrecked truck, it could be a MULTITUDE of things causing this. Pinched or broken wires comes to my mind first, but you need to see what codes you got as a starting point.

Edited May 15, 2023 by newdude

GMCustomerService · May 15, 2023

2 hours ago, B Batt said:

I was being cheap and upgraded my 11 GMC Sierra with 200K Miles with a wrecked 22.5 Refreshed Silverado with the L3B 2.7. Since it was wrecked GM wont warranty it, which I was aware of. It had 800 miles on it and I bought it for 23K Cash. After draining the rest of my savings in headlights, grill, hood, bumper, paint etc I'm into it 28K right now. I thought I was done... Well the parts gods had different things in mind. And I was wondering if anyone had any of these issues yet?

I drove it around 900 miles so far with no issues, but I went to get on it the other day and it was having an issue feeling like it wasn't getting enough fuel. Low an behold "Reduced acceleration. Drive with Care" popped up. Also my fuel light came on and is now reading empty even though I filled it up 20 minutes before.

I feel as it might be the High Pressure Fuel Pump going bad, but would that cause my fuel gauge to go bad and my light to kick on?

Any thoughts?

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B Batt · May 15, 2023

1 hour ago, newdude said:

SCAN. FOR. CODES. Link to a great OBD code reader - BlueDriver

Being you bought a wrecked truck, it could be a MULTITUDE of things causing this. Pinched or broken wires comes to my mind first, but you need to see what codes you got as a starting point.

Yea I bought a scanner last night - Just waiting for Amazon to deliver it. I checked all the wires I could see, and everything looked good. It wasnt hit that hard, but ya never know.

4banger · July 28, 2023

I ran Amsoil oe for a bit and through winter and extreme cold it was using oil and had that same thing happen to mind once it got low enough. Added oil and after a few starts and stops all back to normal. Have you checked your oil level? I don't think my issue had fuel light come on and read empty but engine light for sure and same display and limp mode on power delivery.

Edited July 28, 2023 by 4banger