Recent content by JohnB

93 Factory Radio repair options?

Johnckhall... On the M1A, CLK ON/OFF displays time (or not) with the radio OFF. Contacted RetroMfg. Procedure thay gave me is for the Retro Classic (right and left volume/control knobs). I modified their instructions for the Santa Cruz M1A. I previously contacted Retro on the lack of...
- JohnB
- Post #25
- Feb 16, 2023
- Forum: Audio + Electronics
93 Factory Radio repair options?

To anyone who installed the Retro Santa Cruz M1A radio, is there a way to display the clock (time) with this radio on? I've installed this radio, and documentation is limited. Clock only displays when radio is off.
- JohnB
- Post #22
- Feb 14, 2023
- Forum: Audio + Electronics
Shorty Header question

In my 1990 C1500, 5.7L, installed Pacesetter silver ceramic shorty headers (Summit Racing). They bolted right in. Attached to Walker Y-pipe, ceramic coated catalytic converter, and Gibson SS CAT back single exhaust. Originally had Taylor carbon exhaust gaskets, but they blew out after about...
- JohnB
- Post #17
- Dec 26, 2021
- Forum: Exhaust
Wipers won’t shut off

Had the infamous wiper issue on my 1990 GMC C1500. Problem was cracked solder joints in the wiper pulse module. Re-soldered the 5 contacts and problem solved. Here's a link to the many YouTube videos showing the fix. Chevy pickup truck wipers stop working in the rain! How to fix! - YouTube
- JohnB
- Post #12
- May 4, 2021
- Forum: Audio + Electronics
Two tone paint combos?

Here's my 1990 with GMC White 50 and Light Blue Metallic 27. Cap was match-painted and put on by dealer when the truck was purchased new in October 1989. While I took this picture in 2019, original paint has held up except for the hood and section of cab roof. I repainted the hood in 2019...
- JohnB
- Post #69
- Nov 23, 2020
- Forum: Paint / Body / Detailing
Heater, Vents, A/C Control Panel

Thanks for the response guys. Before seeing your posts this morning, I tried a couple of things yesterday, and apparently the problem has been resolved. I decided to pull the heat control panel unit out of the dash to check it out. Disconnected the battery. Pulled heater fuse out of its...
- JohnB
- Post #5
- Mar 30, 2019
- Forum: Audio + Electronics
Heater, Vents, A/C Control Panel

1990 GMC C1500 Sierra, TBI 5.7 L. Passenger side header (Pacesetter Shorty) gasket has been leaking for months. Crappy fiber gasket just failing apart. Decided to replace gasket with AC Delco multi layered metal #12550033. OK. First thing I do is disconnect ground cable on battery. Then start to...
- JohnB
- Thread
- Mar 27, 2019
- Replies: 5
- Forum: Audio + Electronics
How should I paint

Here's my 2-tone 1990 Sierra. White (WA 8624), and light blue metallic (WA 9264).
- JohnB
- Post #9
- May 17, 2017
- Forum: Paint / Body / Detailing
89 5.7/auto gray smoke out drivers exhaust calling all TBI experts

May need to replace valve seals. My 1990 C1500 5.7L started smoking at 119000. Replaced seals. Problem resolved.
- JohnB
- Post #8
- May 10, 2017
- Forum: Engine Performance + Maintenance
New (Old) GMC from CT

Previous trucks include F150, C10, and several Toyotas and Datsuns. Here's my latest ride... a frame-off restoration of a 1990 GMC C1500 (Sierra SLE) with original 5.7L, 700R4 automatic with 104,000 miles. A one-owner Massachusetts truck, always garaged, and REALLY taken care of (owner was GMC...
- JohnB
- Thread
- Mar 30, 2017
- Replies: 6
- Forum: Introduction