ZR1 Glass vs Plastic Headlamps

[Kevin]

Originally Posted by swamp

Kevin, the build date can be found on the inside of the driver's side door jam. There are two white labels on the driver's side door jam. The first label will have the build date on the upper left hand side. It will be a month/year posting. The second smaller label has the tire pressure settings.
Thanks again for your help and enjoy your ZR1. I only wish that I had one.

i'll set myself a reminder for may when I get the car out of storage and let you know what I find.

[tccrab]

I have already posted at the CF, but here it is again.
1990 #792 Glass.

'Crabs

[John Boothby]

Originally Posted by Blue Flame Restorations

Been involved with NCRS and restoring Corvettes for a LONG time. It's very dangerous to get caught up in definitive cutoffs on parts transitions. I also worked for GM in multiple plants. Multiple suppliers and old stock play into the manufacturing process as the norm.

You keep the line running at all costs.

I can agree to this. I once bought a New 1982 Trans Am. It was built late in the run and they had run out of rear disc's so it had rear drum brakes! Also the interior was a color that was not on the Interior color list for that year! Should have kept it, problably would have been a rareity. Ha ha

[Franke]

Just looking for a little clarification here. My 1990 has glass as I posted on CF but my question is, does the OE headlights have "Guide" written in the glass as mine does?

[swamp]

I agree with you statement about trying to get a definite cutoff date.
My efforts were only to show the possibilities that either glass or plastic were used in the 1990 ZR1. Had a request to help out because a ZR1 owner had Glass Headlamps and he was told by other ZR1 owners that he should have plastic headlamps. He had an early 1990 ZR1 which I have found to have Glass Headlamps.

I ran into the same problem with my 1995 LT1. Had upper radiator hose that was not listed in any parts book. By doing a survey I found other early 1995 LT1 owners with the same hose. My 95 was a first day production model.

I do these surveys for fun and I enjoy meeting fellow Corvette owners who are good enough to take the time to help.

I am always happy to take suggestions and recommendations from those who took the time to respond to my requests for help.

Thanks again for your time.

[swamp]

Franke, I can not answer that question as of now. In my survey I did not get any photos of the early ZR1 1990 Glass Headlamps.
However, I had three individuals who had early 1990 Glass Headlamps refer to them as Guide.
I have reached out for some photos. Is is possible for you to send me some photos of your Headlamps at fulassoc@comcast.net.

Also in my survey I came across some original Glass Guide Headlamps on a 1992 LT1. The Photos were unclear as to what was imprinted on the front, but the word Guide was on the back of the headlamp with a date code.

Guys like you really help me out with their information and willingness to share this information. I just pass it on to the individual who asked me for help.
When I get a response, I will let you know.

[Franke]

Originally Posted by swamp

Franke, I can not answer that question as of now. In my survey I did not get any photos of the early ZR1 1990 Glass Headlamps.
However, I had three individuals who had early 1990 Glass Headlamps refer to them as Guide.
I have reached out for some photos. Is is possible for you to send me some photos of your Headlamps at fulassoc@comcast.net.

Also in my survey I came across some original Glass Guide Headlamps on a 1992 LT1. The Photos were unclear as to what was imprinted on the front, but the word Guide was on the back of the headlamp with a date code.

Guys like you really help me out with their information and willingness to share this information. I just pass it on to the individual who asked me for help.
When I get a response, I will let you know.

Here is a couple of pics of the front headlight glass. Both sides are the same. I did not disassemble my headlights to view the back to see if they were stamped as in your photo. Sorry they are upside down as I took the pics from the engine bay.

[efnfast]

I have the same bulbs as Franke. Because they are glass, I ASSUMED they were replacements. I own 1990 #1786. Glad I didn't throw them away when I replaced them.

[tccrab]

As luck would have it, I was driving "Girlfriend" last week just after sundown and when I turned on the headlights it became quickly obvious that "Girlfriend" had developed "Lazy Eye".
*sigh*.
This weekends chore is to RR the headlight motors and replace the bushings.
Oh the joy.
When I have them out I will post up pics, you want the front and the back, yes?

'Crabs

[swamp]

Folks, I want to thank everyone who provided information on this topic and to Franke for the great photos. It looks like the change over took place between 1990 VIN 1964 and 1990 VIN 2124. I am sure that there are some intermingled headlamps in between these numbers, but it gives us an idea of when it happened.
The general time period is nice to have and it looks like another individual did not toss his glass headlamps away because he thought they should be plastic.
Like I mentioned earlier, don't through nothing away.

Again, as being a new guy here and no owing a ZR1, I do appreciate all your time and effort. Your comments are greatly appreciated.

Also, if you do have a 1990 ZR1 and you haven't posted here with your comments, please do so as I can use all the substantiation that I can get.
I have a total of 20 1990 ZR1's that responded to my various survey requests.

Pat