alpinecrick

Yes, those are two different issues. Don't know about reverse, but usually when one gear goes it's getting time for a trans rebuild. First, just in case you're not aware, the truck will not shift in or out of 4 Lo until the truck is stopped and in neutral (sometimes they will shift when in Park though). The flashing shift button light is telling you the actuator is not engaging the front axle. You ost likely need a new actuator. This is a common problem with the thermal actuators. The electric actuators are more reliable and shift engage the axle almost instantly. They do not like to be immersed though. The electric version requires a new wiring harness and can be a challenge to route the wiring back to the cab.

'Cause my GMT400's and 800's with 26 ga tanks will go almost as far as my brand new '74 K10 LWB with two 24 ga tanks would,, and will easily travel as far as my 76 K10 SWB with factory 400 SB with two 15 ga tanks would. My '06 Duramax will go a long ways when empty, not so much when pulling four horses though...... Short of installing a tank in the bed no fullsize truck will go as far as most of us would like......... It's already been mentioned but initially the square body Blazers and Suburbans had a optional 40 ga tank that was a common option. When one of the gas crisis broke out the media became fixated on GM's 40 ga tanks and in the late 70's or so they dropped that option.

When there is no gas station within a hour and half drive, fuel capacity can indeed become an issue. Some places I go to I carry a 5 ga can of spare gas.........

The GMT400 "Tahoes" were introduced in the 1992 model year, but were still badged as K5 Blazers until about '94. The GMC was badged as the Yukon in '92. The interior was updated in 95 for all GMT400 trucks and SUV's. '96 saw the Vortec motors. '97 saw the Auto Trak transfer cases in the SUV's become standard (not available in the pickups to my knowledge). The GMT Tahoes/Yukons were produced through 99, and replaced with the GMT800's in 2000, EXCEPT GM continued to produce two "Special Edition" GMT400 Tahoes--the Z71 and the Limited at one plant in Texas through 2000. So, interiors will interchange with your Tahoe beginning in 95. Motors in 96. Some running gear with interchange going back to 92.