Question about 1998 GMC Sierra

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1998 GMC Sierra 2500 p/u starts and dies when warmed up

This truck has 253,000. miles It does okay when cold. If I drive 10 miles, park 30 min then start it, it dies several times at low rpms, if I have to stop or before I can get it in drive. It does not break down once you are rolling.

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Check throttle body for chocking

Posted on Dec 24, 2008

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2000 tundra v6 5-speed cold start truck runs great, park it for 20-30 min it will start fine but after going 1/4 mile it dies, looses power. pull over and it will backfire and sputter until it eventua


bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.

just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?

Jan 31, 2014 | 2000 Toyota Tundra

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89 GMC 5.7L. P/U When driving after a few miles the truck dies. Let it cool down and it starts back up till it warms up then it dies again.Sometimes i go 2 miles or 20 miles just depends.


Check the primary and secondary resistance of your coil. Also check spark plug wire resistance. The coil will short out when it heats up if it is going bad.

Oct 05, 2010 | 1989 GMC Sierra

2 Answers

1998 chevy 1 ton 4x4 diesel starts then stalls after gas is given


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1 Answer

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1 Answer

It takes the heater a long time to heat up


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2 Answers

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The anti thieft system is keeping it from running.

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Sounds like the cam positioning sensor. I have a 2002 GMC 2500HD 8.1L and this happened to me. Hope this helps.

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THERMOSTAT REPLACE IF NOT SEE IF HOSES ARE CLOGGED SHOT OF AIR COULD HELP OR DISSCONNECT BATTERY CABLE 10-15 MIN CONNECT BACK TRY HEATER

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1 Answer

Low oil when engine warms up gmc sierra 1995


30-40 psi of oil pressure is fine for many vehicles including your GMC. I am assuming that the truck has more than 100,000 miles on it and still has the original engine in it. By rule of thumb you only need 10 psi per 1000 rpms in a typical street driven engine to give adequate oil pressure to keep the bearings from oil starvation. The oil pressure is typically higher when initial start up occurs because it is more viscous due to the temperature of the oil as the engines oil warms up the visconsity thins out and the oil flows more smoothly. The drop in oil pressure is a normal occurance. Above 45 is more than required for a daily driven street engine. I believe that the specs on that engine only list 30- 45 psi.

Dec 07, 2008 | 1998 GMC Sierra

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