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What About the 4.8L?

parkercl

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parkercl Enthusiast

parkercl

Posted
Posted

It seems that there are very few 4.8L owners on this forum who have much to say about their engines. I for one love mine. It gets great gas mileage and its just right for pulling around my 1500 ECSB 4x4 Sierra. I don't tow and my truck is just another family car.

 

My Jimmy has minimal miles (3000) so I would like to hear from some of you who have put a few more miles on the odometer or your 4.8's. Do you love 'em? Do you hate 'em? How are they holding up? Is anyone experiencing any issues? What's the expected life?...

 

Thanks,

 

CP :thumbs:

PELICAN Enthusiast

PELICAN

Posted
Posted

I have the 4.8 in my ext cab truck with around 96,000 miles and no problems. I have used it for towing and mild off roading. I have no complaints with it. It will get up and go and will also get decent mileage.

DEV1ST8R Enthusiast

DEV1ST8R

Posted
Posted

Love mine too. . .doesn't suck up the gas like a big truck should. And at 94,000 miles - I have NO complaints!

RyanZ71 Senior Enthusiast

RyanZ71

Posted
Posted

The 4.8 in my 2001 Sierra 2WD Work truck really struggles to hold highway speeds with a 40 ft extendable ladder on the roof, the 2000, and 2001 Silverados from my company which have 5.3s in them don't have that issue. Other then that it does great in the city! Sounds alot like my my 5.3 in my Silverado but revs a bit higher.

GMCStepSide Enthusiast

GMCStepSide

Posted
Posted

I've got almost 5,000 miles on mine and love it. I use it for a commuter and have found that I can easily do 20 mpg as long as I keep it under 60 mph. I'm sure I will see a minor drop in the winter when I use 4 wheel drive but even then it'll get better mileage than driving a 8.1....of course, I wouldn't want to pull the same thing with mine that I'd pull with an 8.1. It's a great little engine but isn't well suited for pulling heavy trailers. Fantastic engine that has plenty of power to pass yet gets fantastic mileage for a V-8.

Guest chevydeerhunter

Guest chevydeerhunter

Posted
Posted

I've got an '03 Ext cab with the 4.8 and just over 25k on the clock and no problems whatsoever. I've just had a wait4meperfomance tune in mine for about two weeks and mileage seems to be up but I won't know until I fill up again. I just blazed this Furd today who jumped me off the light. When I laid the hammer down, it chriped the tires during the 1-2 shift and the 2-3 shift. Totally smoked his a#@! :nopity:

jeffster Enthusiast

jeffster

Posted
Posted

I have a 2000 Ext 4WD that I bought new and I love it. Am having a starting issue right now at 86,000 miles, but I am pretty sure it is related to the retarded passlock system.

 

I regularly tow a 19' I/O openbow boat, and more often then not the bed is filled cab high with camping stuff. I have no problems at all, and the truck performs just fine. I also have a 2001 Suburban with the 5.3, but am glad I went with the 4.8 in the truck, as I really don't need the extra power.

 

When I ordered the truck originally, I almost went for the 5.3 because I figured the resale value would be higher, but now that the truck is paid for and has performed so well, I don't see me parting with it any time soon.

 

Glad to see there are others who love their 4.8s as well!

dr9672723 Enthusiast

dr9672723

Posted
Posted

I love mine as a daily drive but having recently traded a V6 for it, I was surprised that the V6 had more low end torque that the 4.8. Even when towing a small

trailer, I have to rev the 4.8 up much higher than the V6 to get it into it's "powerband."

Cheekster96 Enthusiast

Cheekster96

Posted
Posted

:nopity: Holy Cow...didnt expect to see someone else from Maine. Where in Maine are you at parkercl? I am up near Augusta.

Anyways...I have a 2003 Sierra ECSB 4x4 with the 4.8 and have no complaints from it. I have already put on just under 10,000 miles in the four months that i have owned it.

I average about 19.5 mpg from commuting 50 miles to work one way. I recently just installed a tune from Jesse (waitformeperformance.com) and am awaiting better fuel economy results.

I have just over 62,000 miles on it. Change the oil reguallary at 3K miles and have already done the tranny, transfer case and front diff fluids.

Am happy with the truck. No complaints.

Lee

Perandall Enthusiast

Perandall

Posted
Posted
It seems that there are very few 4.8L owners on this forum who have much to say about their engines. I for one love mine.  It gets great gas mileage and its just right for pulling around my 1500 ECSB 4x4 Sierra.  I don't tow and my truck is just another family car.

 

My Jimmy has minimal miles (3000) so I would like to hear from some of you who have put a few more miles on the odometer or your 4.8's.  Do you love 'em? Do you hate 'em? How are they holding up?  Is anyone experiencing any issues?  What's the expected life?...

 

Thanks,

 

CP :thumbs:

 

 

 

I have a 1999 silverado with the 4.8 and have to admit it has been great truck mainly daily driver almost 100,000 miles and still getting around 20 on city and 24-26 on long road trips. I do however have some codes coming up which i have no idea what to do with them. They are p1416 airsystem fault bank 2 and co265 ebcm relay circuit maybe someone might have some input thanks . :nopity:

TonyMazz Enthusiast

TonyMazz

Posted
Posted

:nopity:

 

I have a 2004 Tahoe with a 4.8L motor...thought I would like it but it's just what I need as my truck is 90% commuter. I drive 40 miles one way to work and am getting 19.5, 19.9 mpg pretty routinely.

 

I don't plan on towing anything significant, but it's nice to know that I can tow a few g's if I had to.

 

Motor has 4500 miles on it and using the GM OLM system to manage my OCI....

 

I had a 4.3L blazer and ran it trouble free for 170K and am hoping to run this one a long time too....

 

Has a 3.73 rear end and this gives me enough low end pickup for what I need.

 

So Far So Good...

allenmehrer Enthusiast

allenmehrer

Posted
Posted

I commute on the weekdays then play on the weekends so this motor is perfect for me. Though if my truck came with a 5.3/6.0 you wouldn't see a tear in my eye.

 

3.73 rear end

GnatGoSplat Enthusiast

GnatGoSplat

Posted
Posted

99 4.8L with 132,000 miles.

I only get 15mpg. I don't think it's ever done better than 16mpg highway. When the temps are <45 degrees out, it idles poorly when cold thanks to the famous GM lower intake manifold leaks.

Other than that, it's an ok engine, but I'd take a 6.0L in a heartbeat.

stef8 Enthusiast

stef8

Posted
Posted

I have a 1999 silverado with the 4.8 and have to admit it has been great truck mainly daily driver almost 100,000 miles and still getting around 20 on city and 24-26 on long road trips. I do however have some codes coming up which i have no idea what to do with them. They are p1416 airsystem fault bank 2 and co265 ebcm relay circuit maybe someone might have some input thanks .

 

P1416 Diagnostic aids

 

Low Air System volume may cause a DTC1416 or an intermittent complaint.

Also check for the following conditions:

-Pinched, kinked or restricted AIR pipes, hoses or fittings.

-Leaks, holes, loose fittings or hoses.

-Restricted or obstructed AIR pump inlet.

 

An air supply hose that is melted before the check valve could indicate exhaust gas

back-flow past the check valve.

 

An intermittent may be caused by any of the following conditions:

-A poor connection.

-Rubbed through wire insulation.

-A broken wire inside the insulation.

 

C0265 Diagnostic aids

 

DTC C0265 usually sets because of an open relay coil or non-closable relay contacts. The relay is located within the EBCM. The relay is not serviceable.

 

 

If you need more info, e-mail me and I'll send you a scan of the page from the HELM manual.

 

Stef

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