GM Truck Club Forum banner
1 - 13 of 13 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter · #1 ·
Got a 2000 Silverado Z71 short box regular cab dark blue with the 4.8. It has a lot of miles 215,000+ but seems to be doing good. Got a great deal on it and it and I needed a truck.

Issues,
-It shifts clunky but nothing outragous for the miles. Added some Lucas tras treatment with little results.
-The tow/overdrive off button on the shifter no longer works.
-It doesn't like to start on cold days. It turns over freely but doesn't want to start. During warm weather it starts perfectly. Battery checked out ok at autozone.

work done,
- new plugs and wires
- all fluids changed to include
- oil every 3,00 miles
- transmission flush
- both differential fluid change
- coolant flush
- Intake cleaning service at local lube shop
- I cleaned out the throttle body with cleaner and a toothbrush

Plans,
- Volant CAI
- Magnaflow dual exhast
- Predator tuner
- fix current issues


I also own a 2006 GTO. It is a fair weather toy/DD. I have a PCV catch can, Billet performance shifter, Predator tuner and some other little mods like blacking out the Pontiac emblems and Royal Purple in trans and dif.
 

·
Registered
Joined
·
2,470 Posts
Welcome

:sign0016: A couple of things to check:
1. Coolant sensor. This is the sensor that tells the PCM the onboard computer how cold it is and in turn the computer tells the injectors adjust the air/fuel ratio. It has a 2 wire connector and is located in the intake manifold near the thermostat housing. Test it, while the enging is cold, by unplugging the connector to simulate a cold conditon and the computer will tell the system to go full rich. If it starts up, buy a coolant sensor.
2. Fuel pressure. Can be the pressure regulator or the fuel pump. You need to test the fuel pressure. If you don't have the tool for this, have your mechanic check the pressure for you.

I hope this helps, come back for more help or to share your experience.

P.S. Is it throwing any DTC codes?
 

·
Registered
Joined
·
5 Posts
Discussion Starter · #3 ·
I will try the coolant sensor when it gets colder out. It starts fine when its warm just doesn't want to start when its close to or below freezing.
I don't have a fuel pressure tester but I could take it in a have it checked. I do hear the fuel pump running when I turn the ignition on.
I don't know if it's throwing any codes (don't have my handheld yet) but I assume it isn't because there is no Check Engine Light.
Thanks for the help,
 

·
Registered
Joined
·
1,749 Posts
welcome! lets see some pics! :sign0016:
 

·
Registered
Joined
·
1,505 Posts
welcome to the forum. If I were to have any new "muscle car" it would be the GTO. They sound mean straightpiped. :great:
 

·
Registered
Joined
·
1,005 Posts
I love GTO's
welcome
 

·
Registered
Joined
·
4,163 Posts
Welcome to the site!
 
1 - 13 of 13 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top