Electrical problems
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Impressive mileage. Can’t wait to see you hit 200,000 miles. -
By 2016 Sierra Owner · Posted
Probably not at this time on the HDs. They are usually 1-2 years refreshed behind the 1500s. I'm really surprised they have not at least shown something of them yet. It's only a few months left before the new model years hit the dealer lots. -
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By Grumpy Bear · Posted
Fuel Update 6/7/2026 Since getting Pepper back I've been blending fuel. 50/50 E-85 - 93 pump gas. At my local pricing that is a 97 octane fuel for the price of regular and metering 48% alcohol. This much gasoline octane locally is $10 a gallon with only one local resource!! I can blend this anywhere I find E-85. Why? Longer range. Same no KR timing pull. More lubricious fuel. No loss in power cylinder cleanliness and a reasonable chance at seeing any future fuel dilution in the UOA's. When I blend with Shell or XOM premiums there is some friction modifier and antiwear enhancement. No cold weather starting issues either. So lots of pluses and few losses. -
That's certainly good to hear that there was nothing alarming on the cover magnet volume wise or chunk wise of metal. I don't recall if the Banks cover holds more oil than the factor cover, what volume did you estimate that it took ?. As to the transfer case I assume you bought whatever brand you wanted of a Dexron VI automatic transmission fluid. Have you changed the automatic trans fluid at some point and actually I don't recall if your truck is the gas or diesel version as that makes the difference as to which transmission and oil type is required in 2023. The problem with my truck is that its the gas engine with the 10 speed and I've not yet attempted to see if I can drop the pan as the silly exhaust is right in the way and I do not want to touch the exhaust system on the manifold end if I can help it, the diesel does not have the Y pipe style exhaust under the pan so is not an issue to remove the pan. -
By Stacey Jaeger · Posted
I have a 2014 GMC Sierra 1500 with 5.3 litre, with 400,000km. I drove it one morning and when starting later in the day it would crank but not start. I figured it had to be the fuel pump, SO i replaced the low pressure fuel pump in the tank. The problem persisted the exact same way, crank but no start. Checked a couple plugs and was getting spark. I then replaced the high pressure fuel pump under the intake. But the same problem persisted, it tried to start right after the high pressure pump replacement for a few seconds but then just cranks. I plugged in a better scan tool with live data and I can see the low pressure pump has the proper pressure but the high pressure pump is only getting 1-3mpa, when the scan tool says it should be 14mpa. The scan tool says the lower pressure fuel is in the 55-60psi range and it hold this pressure when not cranking. But the scan tool shows the high pressure fuel drop down from 2mpa to 0. I am not sure where to go from here, any recommendations or experiences with this condition? High pressure fuel rail sensor replacement?
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