What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[Tonyrodz]

it is if you don't have to pay tax and buy something else to hit the minimum free shipping total, I don't use "prime" but I do have a resale account so no tax
these cookies usually do the trick

https://www.amazon.com/gp/product/B071XHP12B/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1

I also have a tax ID number, but it seems they still charge me tax.

 

[Bill 1960]

Is your fuel pump original?

I have no way of knowing, I’ve had this less than a year. But since the pump is doing fine at 80 mph, it seems unlikely it would be failing at 2 mph. At least that’s what I’m thinking at the moment. Maybe my logic is faulty on that?

 

[Bill 1960]

you could check and clean up the fpcm harness anywhere, walmart parking lot, that's the first thing I would check, testing the fuel pressure is just a screw on valve I think it's called a Schroeder valve on the fuel rail, the fuel pressure tester will come with a couple different universal fittings. $30 diy and you can monitor it for as long as you need to
testing the fuel pressure will tell you if the sensor is working properly or not, I would use a scanner and the tester at the same time and see if they match up, if the fuel pressure is good with the tester and the sensor is giving erratic readings then you know. the only catch is the stupid sensor is only $25 or so......

Yeah, that’s some great suggestions. Although I’m concerned about being featured on the next people of Walmart video LOL.

Looking at the prices of the parts the sensor and the control module don’t cost that much. I may shotgun it and just replace both while cleaning the connectors. Of course I’ll need to find a shop with a bidirectional scanner to program the module if I do. I am very much regretting not having the time to buy and learn a Tech2 before this summer’s expedition.

 

[Doubeleive]

I also have a tax ID number, but it seems they still charge me tax.

you have to change it to a business account, then be sure to enter your hours and days open including holidays or you wont get delivery's on the weekends by default.
if you have a regular account and prime it won't carry over the prime to the business account, business prime is like $150 every 6 months or something stupid like that which is why I don't have it.

 

[Tonyrodz]

you have to change it to a business account, then be sure to enter your hours and days open including holidays or you wont get delivery's on the weekends by default.
if you have a regular account and prime it won't carry over the prime to the business account, business prime is like $150 every 6 months or something stupid like that which is why I don't have it.

Strange, I do have a business acct, and I don't ever remember putting in my hours. I get deliveries Sat and Sun. I pay the normal Prime price too. Weird.

 

[Geotrash]

I have no way of knowing, I’ve had this less than a year. But since the pump is doing fine at 80 mph, it seems unlikely it would be failing at 2 mph. At least that’s what I’m thinking at the moment. Maybe my logic is faulty on that?

I’m asking because I have a Land Rover LR2 that exhibited similar behavior when its fuel pump was failing. And it uses a Delphi pump as OEM that’s a very similar design to our trucks’ pump, complete with the built-in fuel regulator. It would run on the highway all day long but stumble occasionally when sitting in traffic or hesitate significantly driving around town. A new fuel pump solved the problem. And, the fuel pump in my ‘07 Denali started acting strangely last year when it was failing. No drivability issues but it would occasionally throw a code for fuel pressure too high.

I think you’re getting good advice for troubleshooting, and I’m learning about the other potential failure points I didn’t know about as a result, but I can’t help but wonder if it will all land back with the pump. It’s a common problem with these things once they get up in mileage.

 

[wsteele]

Yeah, that’s some great suggestions. Although I’m concerned about being featured on the next people of Walmart video LOL.

Looking at the prices of the parts the sensor and the control module don’t cost that much. I may shotgun it and just replace both while cleaning the connectors. Of course I’ll need to find a shop with a bidirectional scanner to program the module if I do. I am very much regretting not having the time to buy and learn a Tech2 before this summer’s expedition.

I believe Dorman makes a FPCM that doesn’t require local programming, I think they call it something like plug and play OE fix. I have no idea how that works, but I am pretty sure they sell one.

 

[Rocket Man]

I think mine is this one or one just like it

Amazon.com: FAERSI Fuel Injection Pressure Test Kit - Universal Fuel Oil Engine Diagnostic Gauge Tester Set with Fittings, Instructions, Storage Case for Car Motorcycle Truck RV SUV & ATV, 0-100 PSI / 0-7 Bar: Automotive

Buy FAERSI Fuel Injection Pressure Test Kit - Universal Fuel Oil Engine Diagnostic Gauge Tester Set with Fittings, Instructions, Storage Case for Car Motorcycle Truck RV SUV & ATV, 0-100 PSI / 0-7 Bar: Fuel Pressure Testers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

Thanks, added to my list for the future. I’m sure sooner or later I’ll need it.

 

[Doubeleive]

Strange, I do have a business acct, and I don't ever remember putting in my hours. I get deliveries Sat and Sun. I pay the normal Prime price too. Weird.

go into settings and set your tax exemption

 

[Doubeleive]

I’m asking because I have a Land Rover LR2 that exhibited similar behavior when its fuel pump was failing. And it uses a Delphi pump as OEM that’s a very similar design to our trucks’ pump, complete with the built-in fuel regulator. It would run on the highway all day long but stumble occasionally when sitting in traffic or hesitate significantly driving around town. A new fuel pump solved the problem. And, the fuel pump in my ‘07 Denali started acting strangely last year when it was failing. No drivability issues but it would occasionally throw a code for fuel pressure too high.

I think you’re getting good advice for troubleshooting, and I’m learning about the other potential failure points I didn’t know about as a result, but I can’t help but wonder if it will all land back with the pump. It’s a common problem with these things once they get up in mileage.

ya it's a classic fuel pump problem if it stumbles at idle or if it surges at speed