Top 20 1998 Chevrolet Tahoe Questions & Answers

The most likely reason is that they are Daytime Running Lights, but a different light should come on when you switch them off. Check the fuses with a digital ohm meter for continuity WITHOUT removing them. Use the little contacts on the top edge. How many vehicles do you have? I see the Expedition problems as well.

If the battery is dying that quickly you need a new battery On the Tahoe K series 5.7L the fuel pump relay is in the engine compartment to the rear of the engine control module, should be identified on the cover over the relays https://fuse-box.info/chevrolet/chevrolet-tahoe-1995-1999-fuses-and-relay https://scanneranswers.com/signs-of-a-bad-fuel-pump-relay/ https://easyautodiagnostics.com/gm/4.3L-5.0L-5.7L/testing-the-fuel-pump-relay-1

Use the switch

Replace thermostat.

intake gasket might cause it if the coolant froze and broke the seal between the head and intake and is leaking directly into the lifter valley

a small vacuum leak will cost that code to show up.so check your lines.

Obviously your engine overheats and damages the cylinder head gasket , When mixing engine oil with the coolant, it looks like chocolate.

That is an optional relay and would not affect the transmission.

Incorrect installation?

If converter is cloged engine will have hard time getting rid of hot exhaust gasses and will have no power if it runs at all. Check for the gas that comes out - when you nail the engine lots of gas should come out - if it does not amount to much it is obstructing the flow of gasses and needs to be replaced.

Can you give a lot more detail Priscilla., add it and then resubmit the query. Do you mean it will no go into gear at all? Will the gear selector move but no dear engage. (if this is the case first check that the tail lights are working, they must for gears to engage in US automatic cars apparently.) It might be that the gear selector is broken or the torque convertor has collapsed . Try the tail lights first, you c can fix those yourself /

https://www.youtube.com/watch?v=ytqXLSjHNm0

The speedometer is operated differently then the tachometer. Tachometer The tachometer displays the engine speed in revolutions per minute (RPM). Voltage pulses are taken from the ignition control module (ICM) (Gasoline) or the generator (Diesel) and sent to the tachometer. Solid state circuits convert the pulse frequency in order to move the pointer of the tachometer. Tachometer Inoperative (Gas) Step Action Value(s) Yes No 1 Did you perform the OBD II System Check been performed? -- Go to Step 2 Go to Powertrain On Board Diagnostic (OBD) System Check (5.0L/5.7L); Powertrain On Board Diagnostic (OBD) System Check (7.4L) 2 Remove the I/P Cluster. Disconnect the Ignition Coil connector. Connect a J 39200 DMM (continuity) between I/P Cluster connector cavity 6 and ground. Is continuity present? -- Go to Step 3 Go to Step 4 3 Locate and repair the short to ground in CKT 121 (WHT) between the Ignition Coil and the I/P cluster. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? -- Refer to Instrument Cluster System Check -- 4 Connect a J 39200 DMM (continuity) from I/P Cluster cavity 6 to ignition coil connector cavity B. Is continuity present? -- Go to Step 5 Go to Step 6 5 Replace the I/P Cluster. Refer to Instrument Cluster Replacement . Is the repair complete? -- Refer to Instrument Cluster System Check -- 6 Locate and repair the open in CKT 121 (WHT) between the Ignition Coil and the I/P Cluster. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? -- Refer to Instrument Cluster System Check

Jason, it can be a number of things causing the vibration..check the obvious first like Glenn Blevins answer. If that doesn't help then go on to the less obvious things..Like... Hard starting or getting real bad gas mileage? (I know, the mileage sucks to begin with..I own a 2000 OBS Tahoe Limited so I know the mileage sucks!) *Fuel pressure regulator.. *Spider fuel injection..Check these to make sure pressure is holding good. *Distributor..They wear and act crazy...I'm in the process of changing mine now...It made my Hoe shake badly! I don't know what the mileage is on your Hoe but I would say it's about time to start checking all the things I have mentioned. There are lots of really good forums to get info on these trucks..OBS (Old Body Style) trucks have a large cult following so you will not be at a loss for info. The vibration started at about 40 mph and would chill out around 65 mph...I knew it wasn't tires/rims on mine so I hit the forums and found a new world of info and testing to do on mine. If it turns out to be a worn distributor on yours, go to ebay and purchase an billet aluminum made one..about 5-10 dollars more than the stock plastic shell OEM one that came on the truck.

sound's as if either the wheels are out of balance, or the brake rotors are out of round,,, i would say the rotors may need replaced, but have the wheels checked if that's not the prob then replace the roto rs

Have you had your tires balanced? have you had an alignment? do you have any broken suspension parts front or rear? Is your drive shaft bent? balanced? What makes you think changing differential assemblies will stop the 'shaking'?

I believe it is under the intake manifold and i also think there are 2 of them.

Looks like a control arm bolt picture is alittle to closeup to tell which one

might you have the wrong switch , doesnt mean its right if it just "fit"

check for cracks in cap. replace cap and rotor if necessary. should be sealed at the bottom