I have owned many cars and SUV's in the past, but this is my first
pickup. It's a 1999 GMC Sierra 1500 SLE with the 5.3, i love this thing,
it has 66000mi. The previous owner took very good care of it, i have all
the service records.
Is there anything i should know about this year, and can you recommend a
Two items to look out for on this model year:
1. Some early 5.3 motors had a problem called "piston slap", where the
skirt of the piston would rub the side wall of the cylinder on cold start
up. It sounded like knocking or pinging until it warmed up and could cause
scuffing of the inside cylinder wall and piston skirts. GM always claimed
this wasn't a problem (it was most likely due to overly large tolerances
between the piston and cylinder) and not all motors had it. Start the truck
up after it has sat overnight and is completely stone cold and listen with
the hood open. If you hear any sort of knocking or clicking that goes away
after the motor is warmed up then you might have it. However, after 66,000
miles if you don't hear it I wouldn't worry - you're way past the mileage
that everyone reports this problem begins.
2. The ABS unit under the seat has some notoriously bad servos or relays (I
don't exactly know what), but several folks have posted that one day without
warning their ABS module just started buzzing and vibrating and wouldn't
stop until they pulled the fuse. There is a company that specializes in
repairing these units, which is much cheaper than having the entire unit
replaced if you're paying for it yourself. Their web site is
www.absfixer.com Look them up on the web and you will learn more from them
than I can tell you. Their repair service runs about $150.00, but replacing
the unit runs about $400.00 for parts plus around $200.00 for the labor.
These are the only two major issues that I know of. There might be an issue
with the tailgate cables failing, but those should be replaced by GM with
stainless steel ones under recall. The other newsgroup that you could go to
is alt.trucks.chevy for information and opinions.
Cheers - Jonathan
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.